Bump version to 0.2-7

Change-Id: Ic4ec38c2426515c6de762725d55771f70cbfa55d

version.bzl

diff --git a/version.bzl b/version.bzl
index 73c5151..bfaafb4 100644
--- a/version.bzl
+++ b/version.bzl
@@ -4,4 +4,4 @@
 # we currently have no stable releases, we use the "build number" scheme
 # described at:
 # https://www.mojohaus.org/versions-maven-plugin/version-rules.html
-GITILES_VERSION = "0.2-6"
+GITILES_VERSION = "0.2-7"