[build] Enable -Wformat-pedantic compiler warning

gypfiles/standalone.gypi

 # Copyright 2012 the V8 project authors. 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 in the documentation and/or other materials provided
@@ skipping 427 matching lines @@
       ['clang==0', {
         'cflags+': ['-Wno-sign-compare',],
       }],
       ['clang==1 or host_clang==1', {
         # This is here so that all files get recompiled after a clang roll and
         # when turning clang on or off.
         # (defines are passed via the command line, and build systems rebuild
         # things when their commandline changes). Nothing should ever read this
         # define.
         'defines': ['CR_CLANG_REVISION=<!(python <(DEPTH)/tools/clang/scripts/update.py --print-revision)'],
-        'conditions': [
-          ['host_clang==1', {
-            'target_conditions': [
-              ['_toolset=="host"', {
-                'cflags+': [
-                  '-Wno-format-pedantic',
-                 ],
-              }],
-           ],
-          }],
-          ['clang==1', {
-            'target_conditions': [
-              ['_toolset=="target"', {
-                'cflags+': [
-                  '-Wno-format-pedantic',
-                 ],
-              }],
-           ],
-          }],
-        ],
       }],
       ['clang==1 and target_arch=="ia32"', {
         'cflags': ['-mstack-alignment=16', '-mstackrealign'],
       }],
       ['fastbuild!=0', {
         'conditions': [
           ['OS=="win" and fastbuild==1', {
             'msvs_settings': {
               'VCLinkerTool': {
                 # This tells the linker to generate .pdbs, so that
@@ skipping 973 matching lines @@
               '-fsanitize=cfi-vcall',
               '-fsanitize=cfi-derived-cast',
               '-fsanitize=cfi-unrelated-cast',
             ],
           }],
         ],
       },
     }],
   ],
 }