Rename common to android

Rename the "common" package to "android", because common is too
generic.  Also removes all android.Android naming stutter.

Ran:
gomvpkg -from 'android/soong/common' -to 'android/soong/android'
gorename -from '"android/soong/android".AndroidModuleContext' -to 'ModuleContext'
gorename -from '"android/soong/android".AndroidBaseContext' -to 'BaseContext'
gorename -from '"android/soong/android".AndroidModuleBase' -to 'ModuleBase'
gorename -from '"android/soong/android".AndroidBottomUpMutatorContext' -to 'BottomUpMutatorContext'
gorename -from '"android/soong/android".AndroidTopDownMutatorContext' -to 'TopDownMutatorContext'
gorename -from '"android/soong/android".AndroidModule' -to 'Module'

Change-Id: I3b23590b8ce7c8a1ea1139411d84a53163288da7
diff --git a/cc/x86_linux_host.go b/cc/x86_linux_host.go
index 246f83a..6562e6a 100644
--- a/cc/x86_linux_host.go
+++ b/cc/x86_linux_host.go
@@ -3,7 +3,7 @@
 import (
 	"strings"
 
-	"android/soong/common"
+	"android/soong/android"
 )
 
 var (
@@ -227,15 +227,15 @@
 var toolchainLinuxX86Singleton Toolchain = &toolchainLinuxX86{}
 var toolchainLinuxX8664Singleton Toolchain = &toolchainLinuxX8664{}
 
-func linuxX86ToolchainFactory(arch common.Arch) Toolchain {
+func linuxX86ToolchainFactory(arch android.Arch) Toolchain {
 	return toolchainLinuxX86Singleton
 }
 
-func linuxX8664ToolchainFactory(arch common.Arch) Toolchain {
+func linuxX8664ToolchainFactory(arch android.Arch) Toolchain {
 	return toolchainLinuxX8664Singleton
 }
 
 func init() {
-	registerHostToolchainFactory(common.Linux, common.X86, linuxX86ToolchainFactory)
-	registerHostToolchainFactory(common.Linux, common.X86_64, linuxX8664ToolchainFactory)
+	registerHostToolchainFactory(android.Linux, android.X86, linuxX86ToolchainFactory)
+	registerHostToolchainFactory(android.Linux, android.X86_64, linuxX8664ToolchainFactory)
 }