Add documentation for exp-dhat.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@11438 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/exp-dhat/Makefile.am b/exp-dhat/Makefile.am
index 8a88b69..9ee6497 100644
--- a/exp-dhat/Makefile.am
+++ b/exp-dhat/Makefile.am
@@ -2,9 +2,7 @@
 
 #SUBDIRS += perf
 
-#EXTRA_DIST = \
-#	docs/dh-manual.xml \
-#	docs/dh_print-manpage.xml
+EXTRA_DIST = docs/dh-manual.xml
 
 #----------------------------------------------------------------------------
 # Headers, etc