de531ba750
example:
"runtime": {
"framework": "nodejs",
"version": "5.0.0",
"ignoreFlags": true,
"nodeConfigureArgs": ["--fully-static"],
"nodeMakeArgs": ["-j","4"]
}
there is no check if those flags change, which means
if they are changed you must rm -rf the temp directory
will probably push a commit that writes a checksum of them
in the node temp directory so it knows when it is invalid