Makefile: Build docker against 5.3.1

... doesn't work anymore on 5.0. Thanks AWS Lambda Runtime ...

Author: helje5

Makefile

@@ -7,9 +7,9 @@ SWIFT_BUILD_DIR=.build
 CONFIGURATION=release
 
 # docker config
-#SWIFT_BUILD_IMAGE="helje5/swift-dev:5.1.snap2019-07-01"
+SWIFT_BUILD_IMAGE="swift:5.3.1"
 #SWIFT_BUILD_IMAGE="swift:5.1.3"
-SWIFT_BUILD_IMAGE="swift:5.0.3"
+#SWIFT_BUILD_IMAGE="swift:5.0.3"
 DOCKER_BUILD_DIR=".docker.build"
 SWIFT_DOCKER_BUILD_DIR="$(DOCKER_BUILD_DIR)/x86_64-unknown-linux/$(CONFIGURATION)"
 DOCKER_BUILD_PRODUCT="$(DOCKER_BUILD_DIR)/$(TOOL_NAME)"