Pass the gold binary directory to the linker with an absolute path

Pass the gold binary directory to the linker with an absolute path

The previous way "<(PRODUCT_DIR)/../../" doesn't work very well with
some non-default output directories.

(This was fixed for linux in https://codereview.chromium.org/83673002)

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=270167

[cjhopman, 2014-05-10 00:28:05]

https://codereview.chromium.org/276993003/diff/1/build/common.gypi
File build/common.gypi (right):

https://codereview.chromium.org/276993003/diff/1/build/common.gypi#newcode3524
build/common.gypi:3524: '-B<!(cd <(DEPTH) && pwd
-P)/build/android/arm-linux-androideabi-gold',
We should be able to specify this like:
<(DEPTH)/build/...
but the generated ninja files will actually run the linker commands in
<(PRODUCT_DIR) instead of the directory of defining gyp file (like it does for
actions/rules/etc).

Since <(PRODUCT_DIR) is not resolvable at gyp-time to an actual path, we can't
calculate the proper relative path from PRODUCT_DIR to DEPTH.

[Nico, 2014-05-13 08:15:28]

lgtm ಠ_ಠ

[cjhopman, 2014-05-13 16:28:16]

The CQ bit was checked by cjhopman@chromium.org

[commit-bot: I haz the power, 2014-05-13 16:29:41]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/cjhopman@chromium.org/276993003/1

[commit-bot: I haz the power, 2014-05-13 19:32:53]

Change committed as 270167