Googletest export

gtest.cc: make ColoredPrintf static

the prototype was removed from gtest.h in cl/301446904; quiets a
-Wmissing-declarations warning

PiperOrigin-RevId: 329569020

googletest/src/gtest.cc

@@ -3282,7 +3282,7 @@ bool ShouldUseColor(bool stdout_is_tty) {
 // This routine must actually emit the characters rather than return a string
 // that would be colored when printed, as can be done on Linux.
 
-void ColoredPrintf(GTestColor color, const char* fmt, ...) {
+static void ColoredPrintf(GTestColor color, const char* fmt, ...) {
   va_list args;
   va_start(args, fmt);