Created by: v-jizhang
As the same as the ported linux jobs in https://github.com/facebook/buck/pull/2371, added CircleCI jobs run on macos:
- mac_build_openjdk8
- macos_unit_groovy
- macos_build_ant
- macos_test_integration
- macos_test_heavy_integration
- macos_test_android_ndk_15
- macos_test_android_ndk_16
- macos_test_android_ndk_17
- macos_test_android_ndk_18