include yasm and virtual_driver_posix deps on os_posix

BUG=
TEST=compile


Review URL: http://codereview.chromium.org/8688005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@111537 0039d316-1c4b-4281-b951-d872f2087c98

build/all.gyp

@@ -58,7 +58,7 @@
         '<(libjpeg_gyp_path):*',
       ],
       'conditions': [
-        ['OS=="mac" or OS=="linux"', {
+        ['os_posix==1 and OS!="android"', {
           'dependencies': [
             '../third_party/yasm/yasm.gyp:*#host',
             '../cloud_print/virtual_driver/virtual_driver_posix.gyp:*',