[packages] libX11: add a patch from ubuntu that lets libX11 build a postscript file using newer groff (thanks Russell Senior)

This applies to the packages feed.  It fixes a case with newer groff
returning different warming messages than expected by the libX11 build
infrastructure expects.  This patch was shamelessly swiped from Ubuntu's
package.

git-svn-id: svn://svn.openwrt.org/openwrt/packages@26501 3c298f89-4303-0410-b956-a3cf2f4a3e73

Xorg/xorg/lib/libX11/patches/010-ignore-groff-warnings.patch

@@ -0,0 +1,13 @@
+--- a/specs/troffrules.in	2010-01-15 01:11:36.000000000 +0000
++++ b/specs/troffrules.in	2011-01-24 21:37:01.000000000 +0000
+@@ -49,7 +49,9 @@
+ 
+ .ms.ps:
+ 	-$(AM_V_GEN) $(GROFF) -Tps $(GROFF_FLAGS) $< 2> index.$@.raw > $@
+-	@if grep '^[^1-9.]' index.$@.raw | grep -v warning; then exit 1; \
++	@if grep '^[^1-9.]' index.$@.raw | grep -v warning | \
++	    grep -v 'table wider than line width'; \
++	 then exit 1; \
+ 	 else test $$? -le 1; fi
+ 
+ .ms.txt: