alsa-tools: fix build when x11 and gtk+ not available

Current verion of gtk+ (2.15.24) does not accept pure framebuffer as
backend and some alsa-tools sub-modules depend on gtk+.

This patch removes those sub-modules from the build only when x11 is not
set in DISTRO_FEATURES.

(From OE-Core rev: e611bba7bba02ba167b2ae3671b00cc99e4fb29c)

Signed-off-by: Rogerio Nunes <ronunes@gmail.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-multimedia/alsa/alsa-tools/makefile_no_gtk.patch

@@ -0,0 +1,21 @@
+Remove some sub-components which need gtk+.
+
+Signed-off-by: Rogerio Nunes <ronunes@gmail.com>
+
+Upstream-Status: Inappropriate [configuration]
+
+diff --git a/Makefile b/Makefile
+--- a/Makefile
++++ b/Makefile
+@@ -1,8 +1,8 @@
+ VERSION = 1.0.26.1
+ TOP = .
+-SUBDIRS = ac3dec as10k1 envy24control \
+-	  mixartloader pcxhrloader rmedigicontrol sb16_csp seq sscape_ctl \
+-	  us428control usx2yloader vxloader echomixer \
++SUBDIRS = ac3dec as10k1 \
++	  mixartloader pcxhrloader sb16_csp seq sscape_ctl \
++	  us428control usx2yloader vxloader \
+ 	  hwmixvolume hda-verb
+ 
+ all:

meta/recipes-multimedia/alsa/alsa-tools_1.0.26.1.bb

@@ -5,14 +5,15 @@ SECTION = "console/utils"
 LICENSE = "GPLv2 & LGPLv2+"
 DEPENDS = "alsa-lib ncurses"
 
-PR = "r0"
+PR = "r1"
 
 LIC_FILES_CHKSUM = "file://hdsploader/COPYING;md5=94d55d512a9ba36caa9b7df079bae19f \
                     file://ld10k1/COPYING.LIB;md5=7fbc338309ac38fefcd64b04bb903e34"
 
 SRC_URI = "ftp://ftp.alsa-project.org/pub/tools/alsa-tools-${PV}.tar.bz2 \
            file://mips_has_no_io_h.patch \
-           file://autotools.patch"
+           file://autotools.patch \
+           ${@base_contains('DISTRO_FEATURES', 'x11', '', 'file://makefile_no_gtk.patch', d)}"
 
 SRC_URI[md5sum] = "805526ea5d6c40e1f2c94cee86141230"
 SRC_URI[sha256sum] = "553338693707fe6ddfc430b9edc4cd2677390e200c9e38de82ede3394e733841"
@@ -21,6 +22,9 @@ inherit autotools
 
 EXTRA_OEMAKE += "GITCOMPILE_ARGS='--host=${HOST_SYS} --build=${BUILD_SYS} --target=${TARGET_SYS} --with-libtool-sysroot=${STAGING_DIR_HOST} --prefix=${prefix}' ACLOCAL_FLAGS='-I ${STAGING_DATADIR}/aclocal'"
 
+PACKAGECONFIG ??= "${@base_contains('DISTRO_FEATURES', 'x11', 'gtk+', '', d)}"
+PACKAGECONFIG[gtk+] = ",,gtk+,"
+
 do_compile_prepend () {
     #Automake dir is not correctly detected in cross compilation case
     export AUTOMAKE_DIR=${STAGING_DATADIR_NATIVE}/$(ls ${STAGING_DATADIR_NATIVE} | grep automake)