This fixes the following gdb-7.12.1 build error on xtensa architecture:
gdb/xtensa-linux-nat.c: In function 'void fetch_gregs(regcache*, ptid_t, int)':
gdb/xtensa-linux-nat.c:178:23: error: uninitialized const 'regs' [-fpermissive]
const gdb_gregset_t regs;
Backported from: d274ecf4ddf76768af57e27f654b9ce6784b391c
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
