Install watchman on Travis

Reviewed By: hramos

Differential Revision: D5431531

fbshipit-source-id: 071f3aec4851e25387793867c18a2bdbccaa8c00

.travis.yml

@@ -6,6 +6,7 @@ install:
   - nvm install 7
   - rm -Rf "${TMPDIR}/jest_preprocess_cache"
   - brew install yarn --ignore-dependencies
+  - brew install watchman
   - yarn install
 
 script:

scripts/objc-test.sh

@@ -56,7 +56,7 @@ function waitForPackager {
 if [ "$1" = "test" ]; then
 
 # Start the packager
-open "./scripts/launchPackager.command" || echo "Can't start packager automatically"
+./scripts/packager.sh --max-workers=1 || echo "Can't start packager automatically" &
 # Start the WebSocket test server
 open "./IntegrationTests/launchWebSocketServer.command" || echo "Can't start web socket server automatically"