8346059: [ASAN] awt_LoadLibrary.c reported compile warning ignoring return value of function by clang17

Reviewed-by: ihse

Author: SendaoYan

src/java.desktop/unix/native/libawt/awt/awt_LoadLibrary.c

@@ -137,7 +137,9 @@ AWT_OnLoad(JavaVM *vm, void *reserved)
     } else {
         /* Get address of this library and the directory containing it. */
         dladdr((void *)AWT_OnLoad, &dlinfo);
-        realpath((char *)dlinfo.dli_fname, buf);
+        if (realpath((char *)dlinfo.dli_fname, buf) == NULL) {
+            perror((char *)dlinfo.dli_fname);
+        }
         len = strlen(buf);
         p = strrchr(buf, '/');