[Android] Make dex exclude paths relative to output dir.

[Android] Make dex exclude paths relative to output dir.

Having a problem where the paths to exclude when dexing aren't being
properly matched. For example, I will have
'../../out/Debug/example/example.jar' in my --excluded-paths list,
but '../../../out/Debug/example/example.jar' in the paths to dex and
they won't be matched.

This came about when I tried making an uiautomator instrumentation
apk that did not share the same root as the apk under test.

BUG=

Committed: https://crrev.com/4f9c80736b16fc000e97edc0a1fd05fa896e8833
Cr-Commit-Position: refs/heads/master@{#336651}

[mikecase (-- gone --), 2015-06-24 20:37:25]

mikecase@chromium.org changed reviewers:
+ cjhopman@chromium.org

[cjhopman, 2015-06-25 22:57:48]

On 2015/06/24 20:37:26, mikecase wrote:

Hm, I think that things running/writing in the output directory should be using
paths relative to the output directory, not the source root.

[mikecase (-- gone --), 2015-06-26 22:41:06]

Changed so the paths stored in the out/Debug/example_apk/classes.dex.inputs are
relative to the output dir like you suggested.

Currently, the paths that are stored are relative to the gyp files, which is
what is causing my issue.

[cjhopman, 2015-06-26 22:52:58]

https://codereview.chromium.org/1211653002/diff/20001/build/android/gyp/dex.py
File build/android/gyp/dex.py (right):

https://codereview.chromium.org/1211653002/diff/20001/build/android/gyp/dex.p...
build/android/gyp/dex.py:45: help='Path to the output build directory.')
I would maybe have this default to the current directory (i.e. the one the
script is being run in). In GN, all scripts are run in the root output dir.

[cjhopman, 2015-06-26 22:53:07]

Oh right, gyp does actions strangely. The action is actually run in the
directory of the gyp file that defines it. GN's approach makes things make much
more sense. In GN, all actions are run in root_out_dir.

[cjhopman, 2015-06-26 22:53:14]

lgtm

[mikecase (-- gone --), 2015-06-29 20:22:26]

The CQ bit was checked by mikecase@chromium.org

[mikecase (-- gone --), 2015-06-29 20:22:27]

The patchset sent to the CQ was uploaded after l-g-t-m from
cjhopman@chromium.org
Link to the patchset: https://codereview.chromium.org/1211653002/#ps40001
(title: "Default output_dir to cwd (and remove change to internal_rules.gni)")

[commit-bot: I haz the power, 2015-06-29 20:24:44]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1211653002/40001

[commit-bot: I haz the power, 2015-06-29 21:36:39]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-06-29 21:37:37]

Patchset 3 (id:??) landed as
https://crrev.com/4f9c80736b16fc000e97edc0a1fd05fa896e8833
Cr-Commit-Position: refs/heads/master@{#336651}