[oe] wpa-supplicant-0.7.inc patch

[Martin Bures]

I have updated the patch and simplified it a bit.  I do not want to switch
the recipe to use defconfig instead of .config because defconfig is modified
by the recipe.

The change simplifies down to just changing the directory back to ${S}.
Then .config can be found again.  The line above the first test changes the
pwd and this is the problem.

As I already submitted the patch via email, I will continue for this one and
use git's submission mechanism in the future.

Best regards,
martin.