buildroot

package/trousers: fix musl build

The musl libc doesn't provide <bits/local_lim.h>, use <limits.h>
instead.

Fixes:
http://autobuild.buildroot.net/results/f71/f71edcf08f31029ef642415b8351ed14767c8e0e

Signed-off-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>