Add missing defines = [] to boringssl/BUILD.gn

Add missing defines = [] to boringssl/BUILD.gn

Otherwise,

[5f88f5f...]d:\src\cr\src>out\release\gn gen out_gn
ERROR at //third_party/boringssl/BUILD.gn:58:7: Undefined variable for +=.
      defines += [ "OPENSSL_NO_ASM" ]
      ^------
I don't have something with this name in scope now.

on Windows.

TBR=brettw@chromium.org
BUG=354261
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=285433

[scottmg, 2014-07-24 22:21:05]

The CQ bit was checked by scottmg@chromium.org

[brettw, 2014-07-24 22:21:36]

https://codereview.chromium.org/412413002/diff/1/third_party/boringssl/BUILD.gn
File third_party/boringssl/BUILD.gn (right):

https://codereview.chromium.org/412413002/diff/1/third_party/boringssl/BUILD....
third_party/boringssl/BUILD.gn:42: defines = []
I'd personally put this with the cflags at the top, but either way is OK.

[scottmg, 2014-07-24 22:22:43]

https://codereview.chromium.org/412413002/diff/1/third_party/boringssl/BUILD.gn
File third_party/boringssl/BUILD.gn (right):

https://codereview.chromium.org/412413002/diff/1/third_party/boringssl/BUILD....
third_party/boringssl/BUILD.gn:42: defines = []
On 2014/07/24 22:21:36, brettw wrote:
> I'd personally put this with the cflags at the top, but either way is OK.

Done.

[scottmg, 2014-07-24 22:22:47]

The CQ bit was checked by scottmg@chromium.org

[commit-bot: I haz the power, 2014-07-24 22:25:09]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/scottmg@chromium.org/412413002/20001

[commit-bot: I haz the power, 2014-07-25 00:26:55]

Change committed as 285433