[U-Boot] Failure on attempt to build env tools

Hi Marek,

I noticed you recently committed support of AES encryption in U-Boot tools here - http://git.denx.de/?p=u-boot.git;a=commit;h=a8a752c084031905940129f8a6ba3039...

And now I cannot build env tools.

Here's how to reproduce my experience: =============== $ make yourboard_config $ make env make[1]: *** No rule to make target `tools/env/aes.c', needed by `tools/env/aes.o'. Stop. make: *** [env] Error 2 ===============

And from tools/env/Makefile I see that target "aes.o" exists while "aes.c" itself is situated in "./lib" folder.

Could you please try to build env tools and if you see the same error could you please fix it?

If it's me who builds env tools improperly could you please teach me how to build them correctly?