tests/abi: Use code segment for amd64.
First start with ABI proposal.
Try even harder to detect ABI using instr and cs.
Initial try at autogenerating stuff.
Initial syscall file for amd64.
Clean amd64 arch, add x32 syscalls.
Working ABI detection.
Untested ARM support.
Fix Makefile.
ABI work: get_syscall_{name,number}_abi.

The non-abi function will be deprecated when all their instances in the code
have been replaced by ABI variants.
Fix errors in system call generation.
libtracy.{so,a} also depend ARCH_OS.
Clean up Makefile a bit.
Update ABI proposal.
Seperate tracyarch.h
Add more x86 files.
Some abi tests.
get_syscall_name deprecated for abi variant.
Make tracy-event less verbose.
Make amd64 arch less verbose.