Bug 321730 Add cg_merge and cg_diff man pages.

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13442 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/cachegrind/Makefile.am b/cachegrind/Makefile.am
index 43a44af..ef29961 100644
--- a/cachegrind/Makefile.am
+++ b/cachegrind/Makefile.am
@@ -2,7 +2,9 @@
 
 EXTRA_DIST = \
 	docs/cg-manual.xml \
-	docs/cg_annotate-manpage.xml
+	docs/cg_annotate-manpage.xml \
+	docs/cg_diff-manpage.xml \
+	docs/cg_merge-manpage.xml
 
 #----------------------------------------------------------------------------
 # Headers, etc