Makefile.am: Also distribute README.md, GOVERNANCE.md and MEMBERS.md

README was distributed by default due to implicit autotools rules, so
when we renamed to README.md, it stopped being included. While at it,
also add the two other new files.

Signed-off-by: Jonas Ådahl <jadahl@gmail.com>

Makefile.am

@@ -39,6 +39,9 @@ nobase_dist_pkgdata_DATA =							\
 dist_noinst_DATA =								\
 	$(sort $(foreach p,$(unstable_protocols),$(dir $p)README))		\
 	$(sort $(foreach p,$(stable_protocols),$(dir $p)README))		\
+	README.md								\
+	GOVERNANCE.md								\
+	MEMBERS.md								\
 	$(NULL)
 
 noarch_pkgconfig_DATA = wayland-protocols.pc