get_version.sh: Remove - characters from release string

Replace - with . in release strings to fix the following build
error in the dist Makefile target:

  error: line 4: Illegal char '-' in: Release: 4-g1d44b2a
  make: *** [rpms] Error 1

Signed-off-by: Peter Oberparleiter <[email protected]>

Author: oberpar

bin/get_version.sh

@@ -19,6 +19,7 @@ else
 	VERSION=${VERSION:1}
 	if [ "${GITVER#*-}" != "$GITVER" ] ; then
 		RELEASE=${GITVER#*-}
+		RELEASE=${RELEASE/-/.}
 	fi
 fi