More *.m4's to ignore

m4/.gitignore

@@ -4,3 +4,22 @@ ltoptions.m4
 ltsugar.m4
 ltversion.m4
 lt~obsolete.m4
+
+dvdnav.m4
+freetype2.m4
+glib.m4
+gpg-error.m4
+inttypes-h.m4
+libFLAC.m4
+libgcrypt.m4
+libgnutls-extra.m4
+libgnutls.m4
+libxml.m4
+ltdl.m4
+ogg.m4
+pkg.m4
+sdl.m4
+shout.m4
+signed.m4
+speex.m4
+vorbis.m4