hack/make/test-integration-cli: introduce MAKEDIR variable

- every execution of dirname costs time
- less repeating

Signed-off-by: Jörg Thalheim <joerg@higgsboson.tk>
Upstream-commit: 6533cb973f6bab672018148fd6a67644580cc61f
Component: engine

components/engine/hack/make/gccgo

@@ -6,7 +6,7 @@ BINARY_NAME="docker-$VERSION"
 BINARY_EXTENSION="$(binary_extension)"
 BINARY_FULLNAME="$BINARY_NAME$BINARY_EXTENSION"
 
-source "$(dirname "$BASH_SOURCE")/.go-autogen"
+source "${MAKEDIR}/.go-autogen"
 
 go build -compiler=gccgo \
 	-o "$DEST/$BINARY_FULLNAME" \