Save the full sha1sum of the commit we generate patch-4.y-*-gitN from

We save off the top commit into a new file called 'gitrev'.  This will help
us automate exploded tree creation by providing a simple file to read to
get the exact upstream commit to use as the base.

1 files changed, 1 insertions, 0 deletions

diff --git a/gitrev b/gitrev
new file mode 100644
index 000000000..db57bb962
--- /dev/null
+++ b/gitrev
@@ -0,0 +1 @@
+bcee19f424a0d8c26ecf2607b73c690802658b29