uClibc: remove trailer from linuxthreads-errno patches confusing modern patch

Modern versions of patch (2.6.1.81 / 85 tested) gets confused by the empty
git trailer referencing uClibc_errno.h (from when patch was forward ported
from 0.9.31), so drop it.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>