More symbol versioning stuff


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@250 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/vg_libpthread.vs b/vg_libpthread.vs
index 05f133b..af225b7 100644
--- a/vg_libpthread.vs
+++ b/vg_libpthread.vs
@@ -4,3 +4,6 @@
 
 GLIBC_2.1 {
 } GLIBC_2.0;
+
+GLIBC_2.2 {
+} GLIBC_2.1;