[SOL] Implement syscall instruction #311

Job	Run time
abi-dump-setup	1m 21s
Build lldb / Lit Tests (ubuntu-22.04)	26m 24s
Test llvm,clang,libclc / Lit Tests (ubuntu-22.04)	47m 38s
Test lld / Lit Tests (ubuntu-22.04)	10m 50s
Build lldb / Lit Tests (windows-2019)	2m 23s
Test llvm,clang,libclc / Lit Tests (windows-2019)	1m 55s
Test lld / Lit Tests (windows-2019)	1m 58s
Build lldb / Lit Tests (macOS-latest)	17m 22s
Test llvm,clang,libclc / Lit Tests (macOS-latest)	1h 1m 56s
Test lld / Lit Tests (macOS-latest)	8m 50s
abi-dump (build-baseline)	31m 47s
abi-dump (build-latest)	34m 15s
abi-compare	30s
	4h 7m 9s

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