Revert of ensure host compiler is always clang when cross compiling from linux

build/standalone.gypi

Index: build/standalone.gypi
diff --git a/build/standalone.gypi b/build/standalone.gypi
index b4d79f9cea30787d7b7eb1690519133e14c6dd7a..741ab6666fb718a06eacf3b6318b34ff43ebd536 100644
--- a/build/standalone.gypi
+++ b/build/standalone.gypi
@@ -86,7 +86,6 @@
     'werror%': '-Werror',
     'use_goma%': '<(use_goma)',
     'gomadir%': '<(gomadir)',
-    'host_clang%': '1',
 
     # .gyp files or targets should set v8_code to 1 if they build V8 specific
     # code, as opposed to external code.  This variable is used to control such
@@ -334,26 +333,6 @@
           }],
         ],
       },
-      'conditions': [
-        ['clang!=1 and host_clang==1 and target_arch!="ia32" and target_arch!="x64"', {
-          'make_global_settings': [
-            ['CC.host', '<(clang_dir)/bin/clang'],
-            ['CXX.host', '<(clang_dir)/bin/clang++'],
-          ],
-        }],
-        ['clang==0 and host_clang==1', {
-          'target_conditions': [
-            ['_toolset=="host"', {
-              'cflags_cc': [ '-std=gnu++11', ],
-            }],
-          ],
-          'target_defaults': {
-            'target_conditions': [
-              ['_toolset=="host"', { 'cflags!': [ '-Wno-unused-local-typedefs' ]}],
-            ],
-          },
-        }],
-      ],
     }],
     # 'OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="solaris"
     #  or OS=="netbsd"'