这个目前是git clone https://android.googlesource.com/platform/manifest.git
然后再 git branch -a 输出的内容，也就是说google android项目目前支持的大的分支 可以支持
git clone https://android.googlesource.com/platform/manifest.git -b xxxx 来获取某个分支的代码
注意,以助记字符为分支的在android代码的任何子工程都是可以通过git branch -a 找到的，也就是说如果git clone 每个命令的 -b 都是用的类似 froyo gingerbread ics-mr1 jb-mr2-dev 这些的话，那代码都是一个版本的，理论上是绝对可以编译通过的。
remotes/origin/android-1.6_r1
remotes/origin/android-1.6_r1.1
remotes/origin/android-1.6_r1.2
remotes/origin/android-1.6_r1.3
remotes/origin/android-1.6_r1.4
remotes/origin/android-1.6_r1.5
remotes/origin/android-1.6_r2
Donut（甜甜圈）：2009年9月15日发布。
remotes/origin/android-2.0.1_r1
remotes/origin/android-2.0_r1
remotes/origin/android-2.1_r1
remotes/origin/android-2.1_r2
remotes/origin/android-2.1_r2.1p
remotes/origin/android-2.1_r2.1p2
remotes/origin/android-2.1_r2.1s
2009年10月26日发布。
remotes/origin/android-2.2.1_r1
remotes/origin/android-2.2.1_r2
remotes/origin/android-2.2.2_r1
remotes/origin/android-2.2.3_r1
remotes/origin/android-2.2.3_r2
remotes/origin/android-2.2.3_r2.1
remotes/origin/android-2.2_r1
remotes/origin/android-2.2_r1.1
remotes/origin/android-2.2_r1.2
remotes/origin/android-2.2_r1.3
//Froyo（冻酸奶） 2010年5月20日发布
remotes/origin/android-2.3.1_r1
remotes/origin/android-2.3.2_r1
remotes/origin/android-2.3.3_r1
remotes/origin/android-2.3.3_r1.1
remotes/origin/android-2.3.4_r0.9
remotes/origin/android-2.3.4_r1
remotes/origin/android-2.3.5_r1
remotes/origin/android-2.3.6_r0.9
remotes/origin/android-2.3.6_r1
remotes/origin/android-2.3.7_r1
remotes/origin/android-2.3_r1
Gingerbread（姜饼） ：2010年12月7日发布。
remotes/origin/android-4.0.1_r1
remotes/origin/android-4.0.1_r1.1
remotes/origin/android-4.0.1_r1.2
remotes/origin/android-4.0.2_r1
remotes/origin/android-4.0.3_r1
remotes/origin/android-4.0.3_r1.1
remotes/origin/android-4.0.4_r1
remotes/origin/android-4.0.4_r1.1
remotes/origin/android-4.0.4_r1.2
remotes/origin/android-4.0.4_r2
remotes/origin/android-4.0.4_r2.1
Ice Cream Sandwich（冰激凌三明治）：2011年10月19日在香港发布。
remotes/origin/android-4.1.1_r1
remotes/origin/android-4.1.1_r1.1
remotes/origin/android-4.1.1_r2
remotes/origin/android-4.1.1_r3
remotes/origin/android-4.1.1_r4
remotes/origin/android-4.1.1_r5
remotes/origin/android-4.1.1_r6
remotes/origin/android-4.1.1_r6.1
remotes/origin/android-4.1.2_r1
remotes/origin/android-4.1.2_r2
remotes/origin/android-4.1.2_r2.1
Android 4.1Jelly Bean（果冻豆）:2012年6月28日
remotes/origin/android-4.2.1_r1
remotes/origin/android-4.2.1_r1.1
remotes/origin/android-4.2.1_r1.2
remotes/origin/android-4.2.2_r1
remotes/origin/android-4.2.2_r1.1
remotes/origin/android-4.2.2_r1.2
remotes/origin/android-4.2.2_r1.2b
remotes/origin/android-4.2_r1
Android 4.2Jelly Bean（果冻豆）:2012年10月30日
remotes/origin/android-4.3_r0.9
remotes/origin/android-4.3_r0.9.1
remotes/origin/android-4.3_r1
remotes/origin/android-4.3_r1.1
remotes/origin/android-4.3_r2
remotes/origin/android-4.3_r2.1
remotes/origin/android-4.3_r2.2
Android 4.3Jelly Bean（果冻豆） 2013年7月25日发布
remotes/origin/android-cts-2.2_r8
remotes/origin/android-cts-2.3_r10
remotes/origin/android-cts-2.3_r11
remotes/origin/android-cts-2.3_r12
remotes/origin/android-cts-4.0.3_r1
remotes/origin/android-cts-4.0.3_r2
remotes/origin/android-cts-4.0_r1
remotes/origin/android-cts-4.1_r1
remotes/origin/android-cts-4.1_r2
remotes/origin/android-cts-4.2_r2
remotes/origin/android-cts-verifier-4.0.3_r1
remotes/origin/android-cts-verifier-4.0_r1
remotes/origin/android-sdk-4.0.3-tools_r1
remotes/origin/android-sdk-4.0.3_r1
remotes/origin/android-sdk-adt_r16.0.1
remotes/origin/android-sdk-adt_r20
remotes/origin/android-sdk-support_r11
remotes/origin/froyo
remotes/origin/gingerbread
remotes/origin/gingerbread-release
remotes/origin/ics-mr0
remotes/origin/ics-mr1
remotes/origin/ics-plus-aosp
remotes/origin/jb-dev
remotes/origin/jb-mr1-dev
remotes/origin/jb-mr1-dev-plus-aosp
remotes/origin/jb-mr1.1-dev
remotes/origin/jb-mr1.1-dev-plus-aosp
remotes/origin/jb-mr2-dev
remotes/origin/jumper-stable
remotes/origin/master
remotes/origin/master-dalvik
目前master主干的代码已经到了 4.3.0了 但是 prebuild 好像还有点问题，完全从主干下载编译会报错。
remotes/origin/tools_r20
remotes/origin/tools_r21
remotes/origin/tools_r21.1
remotes/origin/tools_r22
remotes/origin/tools_r22.2
remotes/origin/tradefed
