Import of CCTZ from GitHub.

PiperOrigin-RevId: 627807723
Change-Id: I106cfe4d3d614b26422f632e856397b8bdcf743e
diff --git a/absl/time/internal/cctz/src/time_zone_libc.cc b/absl/time/internal/cctz/src/time_zone_libc.cc
index d014612..b509402 100644
--- a/absl/time/internal/cctz/src/time_zone_libc.cc
+++ b/absl/time/internal/cctz/src/time_zone_libc.cc
@@ -12,7 +12,7 @@
 //   See the License for the specific language governing permissions and
 //   limitations under the License.
 
-#if defined(_WIN32) || defined(_WIN64)
+#if !defined(_CRT_SECURE_NO_WARNINGS) && defined(_WIN32)
 #define _CRT_SECURE_NO_WARNINGS 1
 #endif