scripts: getver.sh: append Git short hash to revision

Change getver.sh to append a short Git commit hash to the end of the artifical
revision number. This way we still have order- and comparable commit numbers
but also a direct relation to the Git commit.

The new output format will look like "r2400+2-882472e" for dirty trees or like
"r2402-882472e" for clean ones.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

scripts/getver.sh

@@ -40,7 +40,7 @@ try_git() {
 			REV="${UPSTREAM_REV}+$((REV - UPSTREAM_REV))"
 		fi
 
-		REV="${REV:+r$REV}"
+		REV="${REV:+r$REV-$(git log --format="%h" -1)}"
 		;;
 	esac