uclibc: fix PowerPC build problem

A stupid Unicode character was inserted instead of 'D'.

Fixes:
http://autobuild.buildroot.org/results/7a4/7a45fb1379307a788047ec859a4ce2c42d6eb077/build-end.log

.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>