[SOL] Implement syscall instruction #315

Job	Run time
abi-dump-setup	1m 21s
Build lldb / Lit Tests (ubuntu-22.04)	26m 16s
Test llvm,clang,libclc / Lit Tests (ubuntu-22.04)	47m 23s
Test lld / Lit Tests (ubuntu-22.04)	11m 9s
Build lldb / Lit Tests (windows-2019)	2m 14s
Test llvm,clang,libclc / Lit Tests (windows-2019)	2m 10s
Build lldb / Lit Tests (macOS-latest)	14m 18s
Test llvm,clang,libclc / Lit Tests (macOS-latest)	1h 5m 21s
Test lld / Lit Tests (windows-2019)	2m 10s
Test lld / Lit Tests (macOS-latest)	8m 27s
abi-dump (build-baseline)	32m 11s
abi-dump (build-latest)	32m 22s
abi-compare	31s
	4h 5m 53s

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