package/libglib2: update fourth patch

Update fourth patch to add girdir in gio-2.0.pc. This will fix the
following build failure with libnice raised since commit
aade2fd2:

/home/giuliobenetti/autobuild/run/instance-3/output-1/host/riscv32-buildroot-linux-gnu/sysroot/usr/bin/g-ir-compiler nice/Nice-0.1.gir --output nice/Nice-0.1.typelib --includedir=/usr/share/gir-1.0
Could not find GIR file 'GObject-2.0.gir'; check XDG_DATA_DIRS or use --includedir

Fixes:
 - http://autobuild.buildroot.org/results/3088ef32b03e0bb984291b1227b187f1ff816eb7



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