Fix a race in initialization of timezone cache in platform-win32.

src/platform-qnx.cc

Index: src/platform-qnx.cc
diff --git a/src/platform-qnx.cc b/src/platform-qnx.cc
index cd031e795648c69d5dc910761c6e7394f6b59793..ef0998f89aa35aed30d7927ac53c954e30ba48ad 100644
--- a/src/platform-qnx.cc
+++ b/src/platform-qnx.cc
@@ -110,7 +110,7 @@ bool OS::ArmUsingHardFloat() {
 #endif  // __arm__
 
 
-const char* OS::LocalTimezone(double time) {
+const char* OS::LocalTimezone(double time, TimezoneCache* cache) {
   if (std::isnan(time)) return "";
   time_t tv = static_cast<time_t>(std::floor(time/msPerSecond));
   struct tm* t = localtime(&tv);
@@ -119,7 +119,7 @@ const char* OS::LocalTimezone(double time) {
 }
 
 
-double OS::LocalTimeOffset() {
+double OS::LocalTimeOffset(TimezoneCache* cache) {
   time_t tv = time(NULL);
   struct tm* t = localtime(&tv);
   // tm_gmtoff includes any daylight savings offset, so subtract it.