Android WebView: allow for multiple target architectures.

Android WebView: allow for multiple target architectures.

The WebView will eventually need to be built for multiple target
architectures. Prepare for this by passing --suffix .arm to gyp when
generating the makefiles, and including an architecture-specific
makefile at the top level. Also, remove the hardcoding of arm as the
target architecture in envsetup.sh.

The previous change I made to .gitignore to only ignore *.host.mk and
*.target.mk instead of *.mk has been reverted in favour of just
specifically un-ignoring files called Android.mk (which are
handwritten).

BUG=

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=168506

[benm (inactive), 2012-11-16 14:24:05]

lgtm

https://chromiumcodereview.appspot.com/11416036/diff/1/android_webview/tools/...
File android_webview/tools/gyp_webview (right):

https://chromiumcodereview.appspot.com/11416036/diff/1/android_webview/tools/...
android_webview/tools/gyp_webview:16: . build/android/envsetup.sh
--target-arch=arm
#TODO: set target-arch and suffix based on $(TARGET_ARCH) ?

[Torne, 2012-11-16 14:27:22]

On 2012/11/16 14:24:05, benm wrote:
> lgtm
> 
>
https://chromiumcodereview.appspot.com/11416036/diff/1/android_webview/tools/...
> File android_webview/tools/gyp_webview (right):
> 
>
https://chromiumcodereview.appspot.com/11416036/diff/1/android_webview/tools/...
> android_webview/tools/gyp_webview:16: . build/android/envsetup.sh
> --target-arch=arm
> #TODO: set target-arch and suffix based on $(TARGET_ARCH) ?

Rather than use $(TARGET_ARCH) here I'll be generating makefiles for both once
we actually work on x86, in order that this script can be used to regenerate the
makefiles in the snapshot if that's needed. For now we need to leave the x86
makefiles ungenerated to prevent x86 builds from breaking.

[benm (inactive), 2012-11-16 14:38:34]

> Rather than use $(TARGET_ARCH) here I'll be generating makefiles for both once
> we actually work on x86, in order that this script can be used to regenerate
the
> makefiles in the snapshot if that's needed. For now we need to leave the x86
> makefiles ungenerated to prevent x86 builds from breaking.

Ah of course.

[mnaganov (inactive), 2012-11-16 15:01:19]

lgtm