Add uninstall-local rules to make distcheck happy.

Also remove generated FAQ.txt in docs distclean-local rule.

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13950 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/mpi/Makefile.am b/mpi/Makefile.am
index e2144a6..c15680b 100644
--- a/mpi/Makefile.am
+++ b/mpi/Makefile.am
@@ -69,3 +69,5 @@
 
 install-exec-local: install-noinst_PROGRAMS install-noinst_DSYMS
 
+uninstall-local: uninstall-noinst_PROGRAMS uninstall-noinst_DSYMS
+