tools/testing/radix-tree/linux/gfp.h: fix bitrotted value

Apparently, the tools/testing version dates to a few flags ago, and
we've sprouted 4 new ones since.  Keep in sync with the value in the
main tree...

Link: http://lkml.kernel.org/r/23400.1469702675@turing-police.cc.vt.eduSigned-off-by: Valdis Kletnieks <valdis.kletnieks@vt.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

tools/testing/radix-tree/linux/gfp.h

 #ifndef _GFP_H
 #define _GFP_H
 
-#define __GFP_BITS_SHIFT 22
+#define __GFP_BITS_SHIFT 26
 #define __GFP_BITS_MASK ((gfp_t)((1 << __GFP_BITS_SHIFT) - 1))
 #define __GFP_WAIT 1
 #define __GFP_ACCOUNT 0