tests: Use printf instead of debug_printf in u_format_compatible_test.

Use printf instead of debug_printf to be consistent with print
statements in rest of unit tests.

This also fixes the lack of print output with the MinGW build of
u_format_compatible_test.

Signed-off-by: Vinson Lee <vlee@freedesktop.org>
Reviewed-by: Brian Paul <brianp@vmware.com>

src/gallium/tests/unit/u_format_compatible_test.c

@@ -57,7 +57,7 @@ test_all(void)
          }
 
 	 if (util_is_format_compatible(src_format_desc, dst_format_desc)) {
-	    debug_printf("%s -> %s\n", src_format_desc->short_name, dst_format_desc->short_name);
+	    printf("%s -> %s\n", src_format_desc->short_name, dst_format_desc->short_name);
 	 }
       }
    }