Fix linking of libggc_veener.la, and add more needed gnulib modules
Merge pull request #1254 from rrthomas/master

Fix linking of libggc_veener.la, and add more needed gnulib modules
osx: the build is now not liking g_hash_table_new_full() on osx with a GC error. Move
     to glib explicit memory alloc for the hash table values.
Merge pull request #1255 from monkeyiq/2013march/collab-glib-bdw-update1

osx: the build is now not liking g_hash_table_new_full() on osx with a GC error.
Fixed implicit function declaration warnings.