libcommon: Build was fixed. [#METRIQA-600]

libs/libcommon/src/get_revision_lib.sh

@@ -8,7 +8,7 @@ function get_revision {
 	BASEDIR=`dirname "$0"`
 	CURDIR=`pwd`
 	cd ${BASEDIR}
-	git rev-parse --git-dir 2>/dev/null || cd ${CURDIR}
+	git rev-parse --git-dir >/dev/null 2>/dev/null || cd ${CURDIR}
 	git fetch --tags
 	git tag | tag_filter | tail -1 | sed 's/^v1\.1\.\(.*\)-testing$/\1/'
 	cd ${CURDIR}