add glibc 2.7 suppression to the distribution list


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@7226 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/Makefile.am b/Makefile.am
index ef84ca8..e6d735f 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -21,7 +21,7 @@
 
 SUPP_FILES = \
 	glibc-2.2.supp glibc-2.3.supp glibc-2.4.supp glibc-2.5.supp \
-	glibc-2.6.supp aix5libc.supp xfree-3.supp xfree-4.supp \
+	glibc-2.6.supp glibc-2.7.supp aix5libc.supp xfree-3.supp xfree-4.supp \
 	glibc-2.34567-NPTL-helgrind.supp \
 	glibc-2.2-LinuxThreads-helgrind.supp \
 	glibc-2.X-drd.supp