Saner entry point

Summary: makes flow typing for the entry point more sound and fixes two issues

Reviewed By: BYK

Differential Revision: D5507650

fbshipit-source-id: 6b03f7de792ffcece4d0d61950e136a61ea7db2e

local-cli/server/runServer.js

@@ -162,6 +162,7 @@ function getPackagerServer(args, config) {
     platforms: defaultPlatforms.concat(args.platforms),
     polyfillModuleNames: config.getPolyfillModuleNames(),
     postMinifyProcess: config.postMinifyProcess,
+    postProcessBundleSourcemap: config.postProcessBundleSourcemap,
     postProcessModules: config.postProcessModules,
     projectRoots: args.projectRoots,
     providesModuleNodeModules: providesModuleNodeModules,