TestDriver: ignore strcpy call

clang-analyzer has a check for any use of `strcpy`. This usage is safe
because it is allocated above using the length of the string.

Templates/TestDriver.cxx.in

@@ -54,7 +54,7 @@ static char* lowercase(const char* string)
   if (new_string == CM_NULL) { /* NOLINT */
     return CM_NULL;            /* NOLINT */
   }
-  strcpy(new_string, string);
+  strcpy(new_string, string);  /* NOLINT */
   for (p = new_string; *p != 0; ++p) {
     *p = CM_CAST(char, tolower(*p));
   }