buildroot

transmission: fix compile error

After update to uClibc-ng 1.0.18 transmission fails to
compile as the special treatment for sys/quota.h isn't required
anymore, because upstream synced with GNU libc to fix a samba4
compile problem.

Signed-off-by: Waldemar Brodkorb <wbx@uclibc-ng.org>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>