buildroot

libnspr: fix Microblaze patch

Due to a mistake, the Microblaze patch was adding another #elif
defined(nios2), which doesn't make any sense. This commit gets rid of
it.

The rest of the noise in the change is due to the use of quilt to
generate the patches.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>