6631003: Add hg tip changeset to build image
Reviewed-by: mduigou
diff --git a/.hgignore b/.hgignore
index 52a5512..67c8465 100644
--- a/.hgignore
+++ b/.hgignore
@@ -3,3 +3,4 @@
 /nbproject/private/
 ^make/netbeans/.*/build/
 ^make/netbeans/.*/dist/
+^.hgtip