Revert of Revert of linux/gyp: Find missing symbols at build time, not runtime.

third_party/mesa/mesa.gyp

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables': {
     'generated_src_dir': 'src/chromium_gensrc',
   },
   'target_defaults': {
     'defines': [
@@ skipping 664 matching lines @@
         ],
       },
       'conditions': [
         ['OS=="win"', {
           'defines': [
             'BUILD_GL32',
             'KEYWORD1=GLAPI',
             'KEYWORD2=GLAPIENTRY',
           ],
         }],
+        ['OS=="linux"', {
+          'link_settings': {
+            'libraries': [
+              '-ldl',
+              '-lm',
+              '-lstdc++',
+            ],
+          },
+        }],
       ],
       'include_dirs': [
         'src/src/mapi',
         'src/src/mesa',
         'src/src/mesa/drivers',
         '<(generated_src_dir)/mesa',
       ],
       'msvs_disabled_warnings': [
           4005, 4018, 4065, 4090, 4099, 4291, 4345, 4267,
       ],
@@ skipping 36 matching lines @@
                 '<(PRODUCT_DIR)/libosmesa.so',
                 '<(SHARED_LIB_DIR)/libosmesa.so',
               ],
             },
           ],
         },
       ],
     }],
   ],
 }