indicate dirty working tree in version string

Author: kr

src/all.sh

@@ -25,8 +25,12 @@ rm -rf $GOROOT/pkg/${GOOS}_${GOARCH}/doozer
 rm -rf $GOROOT/pkg/${GOOS}_${GOARCH}/doozer.a
 rm -rf $GOBIN/doozerd
 
-VERSION=`git describe | sed s/^v// | tr - +`
 export VERSION
+VERSION=`git describe | sed s/^v// | tr - +`
+if ! git diff --quiet HEAD
+then
+    VERSION=$VERSION+mod
+fi
 
 for req in $REQS
 do goinstall $req