gradle 需要依赖java_home的环境变量，不然就会报个错
2017-08-09 21:45:36.601 java_home[2790:379860] There was an error parsing the Info.plist for the bundle at URL <0x7fa7d9c10c60>: NSCocoaErrorDomain - 3840
export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/