Adding yasm_include.gypi to reuse rules for compiling assembly files

Adding yasm_include.gypi to reuse rules for compiling assembly files

There are a couple spots where we use YASM and this change is a start
to organize the usage of YASM in chromium tree.

BUG=None
TEST=None

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=99751

[scherkus (not reviewing), 2011-09-06 16:51:13]

LGTM w/ nits

http://codereview.chromium.org/7800039/diff/1/third_party/yasm/yasm_compile.gypi
File third_party/yasm/yasm_compile.gypi (right):

http://codereview.chromium.org/7800039/diff/1/third_party/yasm/yasm_compile.g...
third_party/yasm/yasm_compile.gypi:15: #   'ultra_optimized_awsome.asm',
awsome -> awesome :)

http://codereview.chromium.org/7800039/diff/1/third_party/yasm/yasm_compile.g...
third_party/yasm/yasm_compile.gypi:18: #   'yasm_flags': [
does including a gypi do a dictionary merge or a clobber?

for example, would -I get overwritten by the yasm_flags declared below?

http://codereview.chromium.org/7800039/diff/1/third_party/yasm/yasm_compile.g...
third_party/yasm/yasm_compile.gypi:71: # .asm files for ARM will fail.
interesting... I thought we were using YASM for ARM for FFmpeg

[Alpha Left Google, 2011-09-06 17:12:13]

http://codereview.chromium.org/7800039/diff/1/third_party/yasm/yasm_compile.gypi
File third_party/yasm/yasm_compile.gypi (right):

http://codereview.chromium.org/7800039/diff/1/third_party/yasm/yasm_compile.g...
third_party/yasm/yasm_compile.gypi:15: #   'ultra_optimized_awsome.asm',
On 2011/09/06 16:51:13, scherkus wrote:
> awsome -> awesome :)

Done.

http://codereview.chromium.org/7800039/diff/1/third_party/yasm/yasm_compile.g...
third_party/yasm/yasm_compile.gypi:18: #   'yasm_flags': [
On 2011/09/06 16:51:13, scherkus wrote:
> does including a gypi do a dictionary merge or a clobber?
> 
> for example, would -I get overwritten by the yasm_flags declared below?

It'll be a merge.

http://codereview.chromium.org/7800039/diff/1/third_party/yasm/yasm_compile.g...
third_party/yasm/yasm_compile.gypi:71: # .asm files for ARM will fail.
On 2011/09/06 16:51:13, scherkus wrote:
> interesting... I thought we were using YASM for ARM for FFmpeg

YASM doesn't compile ARM code, it's for x86 only. For ARM it's the .S/.s files
which get compiled by gcc.