rpm: Use link time check for libssp

-fstack-protector needs libssp to link with
so when checking for this option support we
need to find if libssp is staged in root file
system

(From OE-Core rev: 492297fce0b80547d3dac9f611f463c6cc95160b)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/rpm/rpm/fstack-protector-configure-check.patch

@@ -0,0 +1,21 @@
+Some options checked in this loop are needing linking to find out
+if the option can be used or not e.g. -fstack-protector which needs
+libssp to be staged and available for compiler to link against
+Therefore we change the compile only check to compile and link check
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+Upstream-Status: Pending
+
+Index: rpm-5.4.0/configure.ac
+===================================================================
+--- rpm-5.4.0.orig/configure.ac	2012-06-01 11:41:19.741480143 -0700
++++ rpm-5.4.0/configure.ac	2012-06-01 11:41:51.773481676 -0700
+@@ -193,7 +193,7 @@
+  my_save_cflags="$CFLAGS"
+  CFLAGS=$c
+  AC_MSG_CHECKING([whether GCC supports $c])
+- AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])],
++ AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
+     [AC_MSG_RESULT([yes])]
+     [my_cflags=$c],
+     [AC_MSG_RESULT([no])]

meta/recipes-devtools/rpm/rpm_5.4.9.bb

@@ -74,6 +74,7 @@ SRC_URI = "http://www.rpm5.org/files/rpm/rpm-5.4/rpm-5.4.9-0.20120508.src.rpm;ex
 	   file://rpm-pkgconfigdeps.patch \
 	   file://uclibc-support.patch \
 	   file://rpmatch.patch \
+	   file://fstack-protector-configure-check.patch \
 	  "
 
 SRC_URI[md5sum] = "60d56ace884340c1b3fcac6a1d58e768"