Add REVISION file when building

build

@@ -1,4 +1,6 @@
 #!/bin/sh
 #go get -v
-go build -ldflags "-X main.gitVersion `git rev-parse --short=8  HEAD`" -v
+REVISION=`git rev-parse --short=8  HEAD`
+echo $REVISION > REVISION
+go build -ldflags "-X main.gitVersion $REVISION" -v
 go install