libX11: fix finding keysymdef.h

Signed-off-by: Stephan Raue <stephan@openelec.tv>

packages/x11/lib/libX11/patches/libX11-1.3.4-pkg_config.diff

@@ -0,0 +1,20 @@
+diff -Naur libX11-1.3.4-old/configure.ac libX11-1.3.4-new/configure.ac
+--- libX11-1.3.4-old/configure.ac	2010-06-03 15:21:17.000000000 -0700
++++ libX11-1.3.4-new/configure.ac	2010-06-09 16:06:19.000000000 -0700
+@@ -35,6 +35,7 @@
+ DOLT
+ AC_PROG_CC
+ PKG_PROG_PKG_CONFIG
++m4_pattern_allow([^PKG_CONFIG_SYSROOT_DIR$])
+ 
+ if test x"$CC_FOR_BUILD" = x; then
+ 	if test x"$cross_compiling" = xyes; then
+@@ -355,7 +356,7 @@
+ # Find keysymdef.h
+ #
+ AC_MSG_CHECKING([keysymdef.h])
+-dir=`$PKG_CONFIG --variable=includedir xproto`
++dir=$PKG_CONFIG_SYSROOT_DIR`$PKG_CONFIG --variable=includedir xproto`
+ KEYSYMDEF="$dir/X11/keysymdef.h"
+ if test -f "$KEYSYMDEF"; then
+         AC_MSG_RESULT([$KEYSYMDEF])