repo init后报错（gpg: Can't check signature: public key not found）
repo init -u rocket:platform/manifest -b master -m default.xml
Getting repo ...
  from http://android.git.kernel.org/tools/repo.git
remote: Counting objects: 1309, done.
remote: Compressing objects: 100% (575/575), done.
remote: Total 1309 (delta 843), reused 1140 (delta 711)
Receiving objects: 100% (1309/1309), 358.04 KiB | 119 KiB/s, done.
Resolving deltas: 100% (843/843), done.
From http://android.git.kernel.org/tools/repo
 * [new branch] maint -> origin/maint
 * [new branch] master -> origin/master
 * [new branch] stable -> origin/stable
 * [new tag] v1.7.5 -> v1.7.5
From http://android.git.kernel.org/tools/repo
 * [new tag] v1.0 -> v1.0
 * [new tag] v1.0.1 -> v1.0.1
 * [new tag] v1.0.2 -> v1.0.2
 * [new tag] v1.0.3 -> v1.0.3
 * [new tag] v1.0.4 -> v1.0.4
 * [new tag] v1.0.5 -> v1.0.5
 * [new tag] v1.0.6 -> v1.0.6
 * [new tag] v1.0.7 -> v1.0.7
 * [new tag] v1.0.8 -> v1.0.8
 * [new tag] v1.0.9 -> v1.0.9
 * [new tag] v1.1 -> v1.1
 * [new tag] v1.2 -> v1.2
 * [new tag] v1.3 -> v1.3
 * [new tag] v1.3.1 -> v1.3.1
 * [new tag] v1.3.2 -> v1.3.2
 * [new tag] v1.4 -> v1.4
 * [new tag] v1.4.1 -> v1.4.1
 * [new tag] v1.4.2 -> v1.4.2
 * [new tag] v1.4.3 -> v1.4.3
 * [new tag] v1.4.4 -> v1.4.4
 * [new tag] v1.5 -> v1.5
 * [new tag] v1.5.1 -> v1.5.1
 * [new tag] v1.6 -> v1.6
 * [new tag] v1.6.1 -> v1.6.1
 * [new tag] v1.6.10 -> v1.6.10
 * [new tag] v1.6.10.1 -> v1.6.10.1
 * [new tag] v1.6.10.2 -> v1.6.10.2
 * [new tag] v1.6.2 -> v1.6.2
 * [new tag] v1.6.3 -> v1.6.3
 * [new tag] v1.6.4 -> v1.6.4
 * [new tag] v1.6.5 -> v1.6.5
 * [new tag] v1.6.6 -> v1.6.6
 * [new tag] v1.6.7 -> v1.6.7
 * [new tag] v1.6.7.1 -> v1.6.7.1
 * [new tag] v1.6.7.2 -> v1.6.7.2
 * [new tag] v1.6.7.3 -> v1.6.7.3
 * [new tag] v1.6.7.4 -> v1.6.7.4
 * [new tag] v1.6.7.5 -> v1.6.7.5
 * [new tag] v1.6.8 -> v1.6.8
 * [new tag] v1.6.8.1 -> v1.6.8.1
 * [new tag] v1.6.8.10 -> v1.6.8.10
 * [new tag] v1.6.8.11 -> v1.6.8.11
 * [new tag] v1.6.8.2 -> v1.6.8.2
 * [new tag] v1.6.8.3 -> v1.6.8.3
 * [new tag] v1.6.8.4 -> v1.6.8.4
 * [new tag] v1.6.8.5 -> v1.6.8.5
 * [new tag] v1.6.8.6 -> v1.6.8.6
 * [new tag] v1.6.8.7 -> v1.6.8.7
 * [new tag] v1.6.8.8 -> v1.6.8.8
 * [new tag] v1.6.8.9 -> v1.6.8.9
 * [new tag] v1.6.9 -> v1.6.9
 * [new tag] v1.6.9.1 -> v1.6.9.1
 * [new tag] v1.6.9.2 -> v1.6.9.2
 * [new tag] v1.6.9.3 -> v1.6.9.3
 * [new tag] v1.6.9.4 -> v1.6.9.4
 * [new tag] v1.6.9.5 -&g