Currently building full gdb for MIPS musl fails because it's trying to
include <sgidefs.h> which is provided by glibc and uClibc, but not by
musl.
However, the kernel headers provide <asm/sgidefs.h> which has the same
definitions, so we can use that one instead.
Backporting a patch that has been sent upstream. Taken from here:
https://sourceware.org/bugzilla/show_bug.cgi?id=21070
Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
