package/libxml2: bump to version 2.9.12

Brown-paper bag release:
https://github.com/GNOME/libxml2/commit/b48e77cf4f6fa0792c5f4b639707a2b0675e461b

Update indentation in hash file (two spaces)

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/libxml2/libxml2.hash

@@ -1,4 +1,4 @@
 # Locally calculated after checking pgp signature
-sha256	886f696d5d5b45d780b2880645edf9e0c62a4fd6841b853e824ada4e02b4d331	libxml2-2.9.11.tar.gz
+sha256  c8d6681e38c56f172892c85ddc0852e1fd4b53b4209e7f4ebf17f7e2eae71d92  libxml2-2.9.12.tar.gz
 # License files, locally calculated
-sha256	c5c63674f8a83c4d2e385d96d1c670a03cb871ba2927755467017317878574bd	COPYING
+sha256  c5c63674f8a83c4d2e385d96d1c670a03cb871ba2927755467017317878574bd  COPYING

package/libxml2/libxml2.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-LIBXML2_VERSION = 2.9.11
+LIBXML2_VERSION = 2.9.12
 LIBXML2_SITE = http://xmlsoft.org/sources
 LIBXML2_INSTALL_STAGING = YES
 LIBXML2_LICENSE = MIT