Oof, create the tools/bin/git-if-needed symlink

Change-Id: I94b76e59fa66b3e1ea6e7316c6d71b3f1139c7de
diff --git a/tools/bin/git-if-needed b/tools/bin/git-if-needed
new file mode 120000
index 0000000..d03ee3c
--- /dev/null
+++ b/tools/bin/git-if-needed
@@ -0,0 +1 @@
+../git-if-needed/sh/git-if-needed
\ No newline at end of file