Fix llvm_symbolizer target on Win-Clang bots

build/sanitizers/sanitizers.gyp

Index: build/sanitizers/sanitizers.gyp
diff --git a/build/sanitizers/sanitizers.gyp b/build/sanitizers/sanitizers.gyp
index c6ce6c2f7888c6cfe66d125593d646bc7e3e181c..64f7cdfc363d5223cdc6a345fc25c9f8fe681e20 100644
--- a/build/sanitizers/sanitizers.gyp
+++ b/build/sanitizers/sanitizers.gyp
@@ -61,20 +61,19 @@
       'target_name': 'llvm-symbolizer',
       'type': 'none',
       'variables': {
-        # Path is relative to this GYP file.
-        'llvm_symbolizer_path':
-            '../../third_party/llvm-build/Release+Asserts/bin/llvm-symbolizer',
+
+       # Path is relative to this GYP file.
+       'llvm_symbolizer_path':
+           '../../third_party/llvm-build/Release+Asserts/bin/llvm-symbolizer<(EXECUTABLE_SUFFIX)',
       },
       'conditions': [
         ['clang==1', {
-          'copies': [
-            {
-              'destination': '<(PRODUCT_DIR)',
-              'files': [
-                '<(llvm_symbolizer_path)',
-              ],
-            },
-          ],
+          'copies': [{
+            'destination': '<(PRODUCT_DIR)',
+            'files': [
+              '<(llvm_symbolizer_path)',
+            ],
+          }],
         }],
       ],
     },