Trim colon from the TZ env value

Change-Id: Ieb9f0c13687fab06141ec2a6523923ae9f243f7f

src/third_party/starboard/rdk/shared/time_zone_get_name.cc

diff --git a/src/third_party/starboard/rdk/shared/time_zone_get_name.cc b/src/third_party/starboard/rdk/shared/time_zone_get_name.cc
index 25a9a53..70ba7c3 100644
--- a/src/third_party/starboard/rdk/shared/time_zone_get_name.cc
+++ b/src/third_party/starboard/rdk/shared/time_zone_get_name.cc
@@ -73,6 +73,7 @@
   /* Check TZ variable */
   if (gTimeZoneBufferPtr == NULL) {
     const char* tz = getenv("TZ");
+    if (tz && *tz == ':') ++tz;
     if (tz && isValidOlsonID(tz)) {
       strncpy(gTimeZoneBuffer, tz, sizeof(gTimeZoneBuffer));
       gTimeZoneBuffer[sizeof(gTimeZoneBuffer) - 1] = 0;