Fix mips build error 'undefined reference to dlopen'

build/common.gypi

 # 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.
 
 # IMPORTANT:
 # Please don't directly include this file if you are building via gyp_chromium,
 # since gyp_chromium is automatically forcing its inclusion.
 {
   # Variables expected to be overriden on the GYP command line (-D) or by
   # ~/.gyp/include.gypi.
@@ skipping 4123 matching lines @@
                     'cflags': ['-mdsp'],
                   }],
                   ['mips_dsp_rev==2', {
                     'cflags': ['-mdspr2'],
                   }],
                 ],
                 'cflags': [
                   '-m<(mips_float_abi)-float'
                 ],
                 'ldflags': [
-                  '-Wl,--no-keep-memory'
+                  '-Wl,--no-keep-memory',
+                  '-ldl',
                 ],
                 'cflags_cc': [
                   '-Wno-uninitialized',
                 ],
               }],
             ],
           }],
           ['target_arch=="mips64el"', {
             'target_conditions': [
               ['_toolset=="target"', {
                 'conditions': [
                   ['mips_arch_variant=="r6"', {
                     'cflags': ['-mips64r6', '-Wa,-mips64r6'],
                     'ldflags': ['-mips64r6'],
                   }],
                   ['mips_arch_variant=="r2"', {
                     'cflags': ['-mips64r2', '-Wa,-mips64r2'],
                     'ldflags': ['-mips64r2'],
                   }],
                 ],
                 'cflags_cc': [
                   '-Wno-uninitialized',
                 ],
+                'ldflags': [
+                  '-ldl',
+                ],
               }],
             ],
           }],
           ['linux_fpic==1', {
             'cflags': [
               '-fPIC',
             ],
             'ldflags': [
               '-fPIC',
             ],
@@ skipping 1913 matching lines @@
     # settings in target dicts.  SYMROOT is a special case, because many other
     # Xcode variables depend on it, including variables such as
     # PROJECT_DERIVED_FILE_DIR.  When a source group corresponding to something
     # like PROJECT_DERIVED_FILE_DIR is added to a project, in order for the
     # files to appear (when present) in the UI as actual files and not red
     # red "missing file" proxies, the correct path to PROJECT_DERIVED_FILE_DIR,
     # and therefore SYMROOT, needs to be set at the project level.
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }