posix.cfg: utimes() is a wrapper for utime(), which is obsolescent. Set utimes() as obsolescent as well.

cfg/posix.cfg

@@ -1695,6 +1695,7 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
       <not-bool/>
       <minsize type="value" value="2"/>
     </arg>
+    <warn severity="style" reason="Obsolescent" alternatives="utimensat"/>
   </function>
   <!-- DIR *opendir(const char *name); -->
   <function name="opendir">

test/cfg/posix.c

@@ -226,6 +226,15 @@ void invalidFunctionArg_fseeko(FILE* stream, off_t offset, int origin)
     (void)fseeko(stream, offset, SEEK_END);
 }
 
+int nullPointer_utimes(const char *path, const struct timeval times[2])
+{
+    // cppcheck-suppress nullPointer
+    // cppcheck-suppress utimesCalled
+    (void)utimes(NULL, times);
+    // cppcheck-suppress utimesCalled
+    return utimes(path, times);
+}
+
 char * overlappingWriteFunction_stpcpy(char *src, char *dest)
 {
     // No warning shall be shown: