Upgrade to Bazel 0.10.1 + sandbox revert

Change-Id: I359ab15f1fc94428acf2e1fd52fd1e0dd5428419
diff --git a/tools/bazel.rc b/tools/bazel.rc
index 8fb26ae..a0dd7a2 100644
--- a/tools/bazel.rc
+++ b/tools/bazel.rc
@@ -58,7 +58,7 @@
 build --sandbox_fake_hostname=true
 build --sandbox_fake_username=true
 
-build --experimental_auto_cpu_environment_group=//tools:cpus
+build --auto_cpu_environment_group=//tools:cpus
 startup --host_jvm_args=-Dbazel.DigestFunction=SHA1
 
 common --watchfs