dropbear: Upgrade 2015.71 -> 2016.73

Backport a patch to fix out-of-tree build.

(From OE-Core rev: b1613c946d1d6e5d7f5964e4d24f1d3146dfe39e)

Signed-off-by: Jussi Kukkonen <jussi.kukkonen@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/dropbear/dropbear/support-out-of-tree-builds.patch

@@ -0,0 +1,43 @@
+From: =?UTF-8?q?Henrik=20Nordstr=C3=B6m?= <henrik@knc.nu>
+Date: Wed, 11 May 2016 12:35:06 +0200
+Subject: [PATCH] Support out-of-tree builds usign bundled libtom
+
+When building out-of-tree we need both source and generated
+folders in include paths to find both distributed and generated
+headers.
+
+
+
+Signed-off-by: Jussi Kukkonen <jussi.kukkonen@intel.com>
+Upstream-Status: Backport
+---
+ libtomcrypt/Makefile.in | 2 +-
+ libtommath/Makefile.in  | 2 +-
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/libtomcrypt/Makefile.in b/libtomcrypt/Makefile.in
+index 3056ef0..7970700 100644
+--- a/libtomcrypt/Makefile.in
++++ b/libtomcrypt/Makefile.in
+@@ -19,7 +19,7 @@ srcdir=@srcdir@
+ 
+ # Compilation flags. Note the += does not write over the user's CFLAGS!
+ # The rest of the flags come from the parent Dropbear makefile
+-CFLAGS += -c -I$(srcdir)/src/headers/ -I$(srcdir)/../ -DLTC_SOURCE -I$(srcdir)/../libtommath/
++CFLAGS += -c -Isrc/headers/ -I$(srcdir)/src/headers/ -I../ -I$(srcdir)/../ -DLTC_SOURCE -I../libtommath/ -I$(srcdir)/../libtommath/
+ 
+ # additional warnings (newer GCC 3.4 and higher)
+ ifdef GCC_34
+diff --git a/libtommath/Makefile.in b/libtommath/Makefile.in
+index 06aba68..019c50b 100644
+--- a/libtommath/Makefile.in
++++ b/libtommath/Makefile.in
+@@ -9,7 +9,7 @@ VPATH=@srcdir@
+ srcdir=@srcdir@
+ 
+ # So that libtommath can include Dropbear headers for options and m_burn()
+-CFLAGS += -I$(srcdir)/../libtomcrypt/src/headers/ -I$(srcdir)/../
++CFLAGS += -I. -I$(srcdir) -I../libtomcrypt/src/headers/ -I$(srcdir)/../libtomcrypt/src/headers/ -I../ -I$(srcdir)/../
+ 
+ ifndef IGNORE_SPEED
+ 

meta/recipes-core/dropbear/dropbear_2015.71.bb

@@ -1,5 +0,0 @@
-require dropbear.inc
-
-SRC_URI[md5sum] = "2ccc0a2f3e37ca221db12c5af6a88137"
-SRC_URI[sha256sum] = "376214169c0e187ee9f48ae1a99b3f835016ad5b98ede4bfd1cf581deba783af"
-

meta/recipes-core/dropbear/dropbear_2016.73.bb

@@ -0,0 +1,7 @@
+require dropbear.inc
+
+SRC_URI += "file://support-out-of-tree-builds.patch"
+
+SRC_URI[md5sum] = "8d6d78ce60ca52350ec04fcbd711ce9b"
+SRC_URI[sha256sum] = "5c61a4f69b093b688629cd365be38701485ff63cfb23642dab7a05ad250aefd7"
+