libxml2: fix errors about missing symbol versioning, bumprev.

srcpkgs/libxml2/patches/enable_symbol_versioning.patch

@@ -0,0 +1,11 @@
+--- configure.orig	2010-12-05 23:51:33.069152384 +0100
++++ configure	2010-12-05 23:51:57.890020401 +0100
+@@ -11414,7 +11414,7 @@ else
+   esac
+ fi
+ 
+- if test -z "$VERSION_SCRIPT_FLAGS"; then
++ if test -n "$VERSION_SCRIPT_FLAGS"; then
+   USE_VERSION_SCRIPT_TRUE=
+   USE_VERSION_SCRIPT_FALSE='#'
+ else

srcpkgs/libxml2/template

@@ -1,6 +1,7 @@
 # Template build file for 'libxml2'.
 pkgname=libxml2
 version=2.7.8
+revision=1
 distfiles="http://xmlsoft.org/sources/$pkgname-$version.tar.gz"
 build_style=gnu_configure
 short_desc="Library providing XML and HTML support"