libglib2: needs autoreconf

Patch 0002-disable-tests.patch modifies Makefile.am, so we have to
autoreconf. It hasn't been seen until now, but becomes very clear
since the bump of automake to 1.15.1, as we're seeing build failures
such as:

configure.ac:66: error: version mismatch.  This is Automake 1.15.1,
configure.ac:66: but the definition used by this AM_INIT_AUTOMAKE
configure.ac:66: comes from Automake 1.15.  You should recreate
configure.ac:66: aclocal.m4 with aclocal and run automake again.

Fixes:

  http://autobuild.buildroot.net/results/3402357d8e90f1866dfeaee7bb61119d80dc8bcb/

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
(cherry picked from commit 45fbec12e79dfd8416b20afa4c2590aecd3ddc5d)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/libglib2/libglib2.mk

@@ -10,6 +10,8 @@ LIBGLIB2_SOURCE = glib-$(LIBGLIB2_VERSION).tar.xz
 LIBGLIB2_SITE = http://ftp.gnome.org/pub/gnome/sources/glib/$(LIBGLIB2_VERSION_MAJOR)
 LIBGLIB2_LICENSE = LGPLv2+
 LIBGLIB2_LICENSE_FILES = COPYING
+# 0002-disable-tests.patch
+LIBGLIB2_AUTORECONF = YES
 
 LIBGLIB2_INSTALL_STAGING = YES
 LIBGLIB2_INSTALL_STAGING_OPTS = DESTDIR=$(STAGING_DIR) LDFLAGS=-L$(STAGING_DIR)/usr/lib install