kernel32/tests: Skip some resource tests on Win7.

dlls/kernel32/tests/resource.c

@@ -125,6 +125,8 @@ static void update_empty_exe( void )
     CloseHandle( file );
 
     res = BeginUpdateResource( filename, TRUE );
+    if ( res != NULL || GetLastError() != ERROR_FILE_INVALID )
+    {
         ok( res != NULL, "BeginUpdateResource failed\n");
 
         /* check if it's possible to open the file now */
@@ -135,6 +137,9 @@ static void update_empty_exe( void )
 
         r = EndUpdateResource( res, FALSE );
         ok( r == FALSE, "EndUpdateResource failed\n");
+    }
+    else
+        skip( "Can't update resource in empty file\n" );
 
     res = BeginUpdateResource( filename, FALSE );
     ok( res == NULL, "BeginUpdateResource failed\n");