Fixes for GPR library on Windows (+ getting rid of warnings under MS C++ compiler)
	Change on 2014/12/09 by jtattermusch <jtattermusch@google.com>
-------------
Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=81704538
diff --git a/build.json b/build.json
index 3769fe9..e185d66 100644
--- a/build.json
+++ b/build.json
@@ -34,6 +34,7 @@
         "src/core/support/string_win32.c",
         "src/core/support/sync.c",
         "src/core/support/sync_posix.c",
+        "src/core/support/sync_win32.c",
         "src/core/support/thd_posix.c",
         "src/core/support/thd_win32.c",
         "src/core/support/time.c",