gpgme: fix configure if 'import distutils' causes output on stderr

There are a number of reasons that importing a module could cause output on
stderr that isn't a fatal error (compatibilty problems with inputrc, or encoding
warnings) so backport a patch from autoconf-archive to only check the exit code
instead of asserting that stderr is empty.

[ YOCTO #11231 ]

(From OE-Core rev: ebfd79ae6e5954253c3bb0886d476be480b24de8)

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-support/gpgme/gpgme/python-import.patch

@@ -0,0 +1,19 @@
+Don't check for output on stderr to know if an import worked, host inputrc and
+sysroot readline can cause warnings on stderr.
+
+Upstream-Status: Backport (from autoconf-archive 883a2abd)
+Signed-off-by: Ross Burton <ross.burton@intel.com>
+
+diff --git a/m4/ax_python_devel.m4 b/m4/ax_python_devel.m4
+index b990d5b..318b089 100644
+--- a/m4/ax_python_devel.m4
++++ b/m4/ax_python_devel.m4
+@@ -137,7 +137,7 @@ variable to configure. See ``configure --help'' for reference.
+ 	#
+ 	AC_MSG_CHECKING([for the distutils Python package])
+ 	ac_distutils_result=`$PYTHON -c "import distutils" 2>&1`
+-	if test -z "$ac_distutils_result"; then
++	if test $? -eq 0; then
+ 		AC_MSG_RESULT([yes])
+ 	else
+ 		AC_MSG_RESULT([no])

meta/recipes-support/gpgme/gpgme_1.8.0.bb

@@ -15,6 +15,7 @@ SRC_URI = "${GNUPG_MIRROR}/gpgme/${BP}.tar.bz2 \
            file://python-lang-config.patch \
            file://0001-Correctly-install-python-modules.patch \
            file://0001-Avoid-host-contamination-from-gpg-config.patch \
+           file://python-import.patch \
           "
 
 SRC_URI[md5sum] = "722a4153904b9b5dc15485a22d29263b"
@@ -70,4 +71,3 @@ do_configure_prepend () {
 	rm -f ${S}/m4/gpg-error.m4
 	rm -f ${S}/m4/libassuan.m4
 }
-