Upgrade to Gradle 5.1.1 stable version (#357)

Summary:
_Per title_
Pull Request resolved: https://github.com/facebook/flipper/pull/357

Reviewed By: jknoxville

Differential Revision: D13761808

Pulled By: passy

fbshipit-source-id: 82e39f78e69966ae2d098629b9c4ed1090c43802

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,5 @@
-#Thu Jul 12 10:47:54 BST 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.1.1-all.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.0-rc-1-all.zip

gradlew

@@ -28,7 +28,7 @@ APP_NAME="Gradle"
 APP_BASE_NAME=`basename "$0"`
 
 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS=""
+DEFAULT_JVM_OPTS='"-Xmx64m"'
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD="maximum"