Make android.check work by using case statement in android-run.py

Make android.check work

[haitao.feng, 2012-07-16 14:10:57]

It seems that "if [ $? -ne 0 ]" does not work in ash. The "if" expects a list
which is is a sequence of zero or more commands separated by newlines,
semicolons, or ampersands, and optionally terminated by one of these three
characters. In my emulator (Android 4.0.3 API level 15), the android-run.py
reports an error "[: not found".

There are two ways to fix this, one is to add a function and still use "if"
like:

"
checkStatus () {
  return $(($? == 0))
}
if checkStatus
"

The other is to use case statement in this review. 

Maybe older version ash supports "if [ $ $? -ne 0 ]", if so, it is better to
have that support in 4.0.3.

After this change, make android.release.check works. It finished after 90
minutes in my machine, and 87 fails. Most of them are time out errors. I will
try to get X86 working to shorten the running time.

[Jakob Kummerow, 2012-07-16 14:36:34]

I'm surprised that this change is necessary. I'm sure that Ulan successfully ran
the script on actual devices (but I don't know if his tests included Android
4.0.3).
Having said that, since this change looks harmless, we can certainly land it.
LGTM.

I have a nit which I'll fix for you before landing, see below.

https://chromiumcodereview.appspot.com/10779011/diff/1/AUTHORS
File AUTHORS (right):

https://chromiumcodereview.appspot.com/10779011/diff/1/AUTHORS#newcode54
AUTHORS:54: Haitao Feng <haitao.feng@intel.com>
Please keep this list sorted alphabetically.

[haitao.feng, 2012-07-16 22:01:49]

https://chromiumcodereview.appspot.com/10779011/diff/1/AUTHORS
File AUTHORS (right):

https://chromiumcodereview.appspot.com/10779011/diff/1/AUTHORS#newcode54
AUTHORS:54: Haitao Feng <haitao.feng@intel.com>
On 2012/07/16 14:36:34, Jakob wrote:
> Please keep this list sorted alphabetically.

Done.