Improvements to GYP build

src/common/common.gyp

 # Copyright 2014 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 17 matching lines @@
 
 {
   'target_defaults': {
     'target_conditions': [
       ['OS=="mac"', {
         'defines': ['HAVE_MACH_O_NLIST_H'],
       }],
       ['OS=="linux"', {
         'defines': ['HAVE_A_OUT_H'],
       }],
+      ['OS!="android"', {'sources/': [['exclude', 'android/']]}],

[Mark Mentovai, 2016/01/28 17:29:22]

Tighter anchoring: '(^|/)android/', etc.

+      ['OS!="linux"',   {'sources/': [['exclude', 'linux/'  ]]}],

[Mark Mentovai, 2016/01/28 17:29:22]

We don’t usually bother with the extra whitespace to line things up. It just
makes diffs and history extra annoying when someone comes up with a new platform
whose name is longer than 7 characters.

+      ['OS!="mac"',     {'sources/': [['exclude', 'mac/'    ]]}],
+      ['OS!="solaris"', {'sources/': [['exclude', 'solaris/']]}],
+      ['OS!="win"',     {'sources/': [['exclude', 'windows/']]}],
     ],
   },
   'targets': [
     {
       'target_name': 'common',
       'type': 'static_library',
       'sources': [
         'android/breakpad_getcontext.S',
         'android/include/elf.h',
         'android/include/link.h',
@@ skipping 186 matching lines @@
         '../build/testing.gypi:gmock_main',
         '../build/testing.gypi:gmock',
         '../build/testing.gypi:gtest',
       ],
       'libraries': [
         '-ldl',
       ],
     },
   ],
 }