conf/layer.conf: add BBFILES_DYNAMIC and dynamic layers

some recipes under meta-oe have dependency on meta-python,
and test_world of yocto-check-layer will failed with error
like:

ERROR: test_world (common.CommonCheckLayer)
ERROR: Nothing PROVIDES 'python3-pytoml-native' (but
/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs_60.9.0.bb
DEPENDS on or otherwise requires it). Close matches:
  python3-numpy-native
  python3-pycairo-native
  python3-rpm-native
ERROR: Required build target 'meta-world-pkgdata' has no buildable
providers.
Missing or unbuildable dependency chain was: ['meta-world-pkgdata',
'mozjs', 'python3-pytoml-native']

fix by make these recipes only active when identified layers are
present

Signed-off-by: Changqing Li <changqing.li@windriver.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/dynamic-layers/meta-python/recipes-support/smem/smem/0001-smem-fix-support-for-source-option-python3.patch

@@ -0,0 +1,53 @@
+From 3ff78f1f00973393d1a7ee4e467a2bacf1c807f3 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Andr=C3=A9=20Draszik?= <git@andred.net>
+Date: Wed, 5 Feb 2020 16:14:21 +0000
+Subject: [PATCH] smem: fix support for --source option (python3)
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Using --source doesn't work without this patch:
+Traceback (most recent call last):
+  File "./smem", line 727, in <module>
+    showpids()
+  File "./smem", line 299, in showpids
+    showtable(pt.keys(), fields, columns.split(), options.sort or 'pss')
+  File "./smem", line 519, in showtable
+    mt = totalmem()
+  File "./smem", line 118, in totalmem
+    _totalmem = memory()['memtotal']
+  File "./smem", line 193, in memory
+    m = f.match(l)
+TypeError: cannot use a string pattern on a bytes-like object
+
+python3's tarfile returns bytes, whereas all of the rest of
+the code assumes str.
+
+Fix the tarfile usage to convert to str before returning the
+results.
+
+Signed-off-by: André Draszik <git@andred.net>
+Upstream-Status: Inappropriate [upstream wants to support python2 & python3]
+---
+ smem | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/smem b/smem
+index 46a3189..54d40dd 100755
+--- a/smem
++++ b/smem
+@@ -90,9 +90,9 @@ class tardata(procdata):
+                 d,f = ti.name.split('/')
+                 yield d
+     def _read(self, f):
+-        return self.tar.extractfile(f).read()
++        return self.tar.extractfile(f).read().decode()
+     def _readlines(self, f):
+-        return self.tar.extractfile(f).readlines()
++        return [l.decode() for l in self.tar.extractfile(f).readlines()]
+     def piduser(self, p):
+         t = self.tar.getmember("%d" % p)
+         if t.uname:
+-- 
+2.23.0.rc1
+

meta-oe/dynamic-layers/meta-python/recipes-support/smem/smem_1.5.bb

@@ -0,0 +1,43 @@
+SUMMARY = "Report application memory usage in a meaningful way"
+DESCRIPTION = "smem is a tool that can give numerous reports on memory usage on Linux \
+systems. Unlike existing tools, smem can report proportional set size (PSS), \
+which is a more meaningful representation of the amount of memory used by \
+libraries and applications in a virtual memory system."
+HOMEPAGE = "http://www.selenic.com/smem/"
+SECTION = "Applications/System"
+
+LICENSE = "GPLv2+"
+LIC_FILES_CHKSUM = "file://COPYING;md5=b234ee4d69f5fce4486a80fdaf4a4263"
+
+HG_CHANGESET = "98273ce331bb"
+SRC_URI = "https://selenic.com/repo/${BPN}/archive/${HG_CHANGESET}.tar.bz2;downloadfilename=${BP}.tar.bz2 \
+           file://0001-smem-fix-support-for-source-option-python3.patch"
+SRC_URI[md5sum] = "51c3989779360f42b42ef46b2831be3a"
+SRC_URI[sha256sum] = "161131c686a6d9962a0e96912526dd46308e022d62e3f8acaed5a56fda8e08ce"
+
+UPSTREAM_CHECK_URI = "https://selenic.com/repo/smem/tags"
+UPSTREAM_CHECK_REGEX = "(?P<pver>\d+(\.\d+)+)"
+
+S = "${WORKDIR}/${BPN}-${HG_CHANGESET}"
+
+do_compile() {
+        ${CC} ${CFLAGS} ${LDFLAGS} smemcap.c -o smemcap
+}
+
+do_install() {
+        install -d ${D}/${bindir}/
+        install -d ${D}/${mandir}/man8
+        install -m 0755 ${S}/smem ${D}${bindir}/
+        sed -i -e '1s,#!.*python.*,#!${USRBINPATH}/env python3,' ${D}${bindir}/smem
+        install -m 0755 ${S}/smemcap ${D}${bindir}/
+        install -m 0644 ${S}/smem.8 ${D}/${mandir}/man8/
+}
+
+RDEPENDS_${PN} = "python3-core python3-compression"
+RRECOMMENDS_${PN} = "python3-matplotlib python3-numpy"
+
+PACKAGE_BEFORE_PN = "smemcap"
+
+FILES_smemcap = "${bindir}/smemcap"
+
+BBCLASSEXTEND = "native"