aarch64: make arm registers unsigned
aarch64: make arm registers unsigned

Follow the x86_64 example and define registers in arm_pt_regs
as unsigned, to avoid potential sign extension bugs.

This also fixes --enable-gcc-Werror build.

* linux/aarch64/arch_regs.c (arm_pt_regs): Change uregs's type
from int to uint32_t.

Reported-by: Sergey Bolshakov <3d5934d6e1ae56c30c3bd3d7ea093756dc28ad87@altlinux.org>

cuviper/strace,Saruta/strace,Saruta/strace,Distrotech/strace,Distrotech/strace,cuviper/strace,cuviper/strace,cuviper/strace,Distrotech/strace,Distrotech/strace,Saruta/strace,Distrotech/strace,cuviper/strace,Saruta/strace,Saruta/strace