chore(build): make tar command configurable by env var

current `tar` command's with option `--owner=0` does not work on
MacOS. make `tar` configurable by environment variable `TAR`.

Author: marjune163

build/build.inc.sh

@@ -6,3 +6,4 @@ source ./build.inc.version.sh
 getLdFlags() {
 	echo "-s -w -X $MOD/version.appVer=$VERSION -X $MOD/version.appArch=${ARCH:-$(go env GOARCH)}"
 }
+TAR=${TAR:-tar}

build/build.sh

@@ -31,6 +31,6 @@ for build in "$@"; do
 	if [ "$GOOS" == "windows" ]; then
 		zip -qrj "${OUTFILE}.zip" "$TMP/"
 	else
-		tar --owner=0 --group=0 -zcf "${OUTFILE}.tar.gz" -C "$TMP" $(ls -A1 "$TMP")
+		$TAR --owner=0 --group=0 -zcf "${OUTFILE}.tar.gz" -C "$TMP" $(ls -A1 "$TMP")
 	fi
 done