glib-2.0: fix a host contamination issue

We will see the following warning by accident:

$ bitbake nativesdk-glib-2.0

WARNING: QA Issue: nativesdk-glib-2.0-dbg: found library in wrong location:
/opt/poky/0.5.5/sysroots/x86_64-pokysdk-linux/usr/share/gdb/auto-load/opt/
poky/0.5.5/sysroots/x86_64-pokysdk-linux/usr/lib/libglib-2.0.so.0.3600.4-gdb.py

There are two '/opt/poky/0.5.5/sysroots' in the path when the warning
comes, this is what we need since glib-2.0 has done this intentionally
in its configure and Makefile.

This is because the configure script uses the:
ABS_GLIB_RUNTIME_LIBDIR = "readlink -f $libdir/$with_runtime_libdir`"
to figure out the abs dir, so if
/opt/poky/0.5.5/sysroots/x86_64-pokysdk-linux/usr/lib/ exists , there
would be warning, otherwise no warning.

We can change the "readlink -f" to "readlink -m" to fix the host
contamination issue.

Another fix could be:
ABS_GLIB_RUNTIME_LIBDIR =""

But this is much more like a workaround.

[YOCTO #5099]

(From OE-Core rev: 3e660ec01cc62c57b379b151e43c7952e97a1c2b)

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/glib-2.0/glib-2.0/glib-2.0-configure-readlink.patch

@@ -0,0 +1,29 @@
+configure.ac: change readlink -f to -m
+
+Change "readlink -f" to "readlink -m" since $libdir/$with_runtime_libdir
+may not exist.
+
+This patch should go to the upstream, I will send it sooner.
+
+Upstream-Status: Pending
+
+Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
+---
+ configure.ac | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/configure.ac b/configure.ac
+--- a/configure.ac
++++ b/configure.ac
+@@ -271,7 +271,7 @@ AC_ARG_WITH(runtime-libdir,
+            [],
+ 	   [with_runtime_libdir=""])
+ GLIB_RUNTIME_LIBDIR="$with_runtime_libdir"
+-ABS_GLIB_RUNTIME_LIBDIR="`readlink -f $libdir/$with_runtime_libdir`"
++ABS_GLIB_RUNTIME_LIBDIR="`readlink -m $libdir/$with_runtime_libdir`"
+ AC_SUBST(GLIB_RUNTIME_LIBDIR)
+ AC_SUBST(ABS_GLIB_RUNTIME_LIBDIR)
+ AM_CONDITIONAL(HAVE_GLIB_RUNTIME_LIBDIR, [test "x$with_runtime_libdir" != "x"])
+-- 
+1.8.1.2
+

meta/recipes-core/glib-2.0/glib-2.0_2.36.4.bb

@@ -15,6 +15,7 @@ SRC_URI = "${GNOME_MIRROR}/glib/${SHRT_VER}/glib-${PV}.tar.xz \
            file://Makefile-ptest.patch \
            file://add-march-i486-into-CFLAGS-automatically.patch \
            file://run-ptest \
+           file://glib-2.0-configure-readlink.patch \
           "
 
 SRC_URI_append_class-native = " file://glib-gettextize-dir.patch"