[build] Patch gtk-doc.make
[build] Patch gtk-doc.make

When using libtool 1.x and versions of gtk-doc < 1.12 with shave, the
resulting libtool wrapper is broken. For this reason we patch out the
gtk-doc.make copied by gtkdocize into our source directory before
running configure.

ebassi/twitter-glib,ebassi/twitter-glib