bsd/aarch64: be explicit about using 32bit instruction form

Signed-off-by: Claudio Fontana <claudio.fontana@huawei.com>
libc: halt on setjmp, longjmp

apply also for the aarch64 elf-dl.S stub.

Signed-off-by: Claudio Fontana <claudio.fontana@huawei.com>
aarch64: clean up and align sections in loader.ld

Signed-off-by: Claudio Fontana <claudio.fontana@huawei.com>
libc: add logs for pthread

Signed-off-by: Claudio Fontana <claudio.fontana@huawei.com>
runtime.cc: add debug statements for abort

Signed-off-by: Claudio Fontana <claudio.fontana@huawei.com>
loader.cc: add debug statements

Signed-off-by: Claudio Fontana <claudio.fontana@huawei.com>