Never define 'DEBUG' for non-v8 code

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/20831003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16012 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

build/standalone.gypi

@@ -120,6 +120,9 @@
     },
     'target_conditions': [
       ['v8_code == 0', {
+        'defines!': [
+          'DEBUG',
+        ],
         'conditions': [
           ['os_posix == 1 and OS != "mac"', {
             'cflags!': [
@@ -132,9 +135,6 @@
             },
           }],
           ['OS == "win"', {
-            'defines!': [
-              'DEBUG',
-            ],
             'msvs_settings': {
               'VCCLCompilerTool': {
                 'WarnAsError': 'false',