Remove load builtins (#96) #249

Job	Run time
abi-dump-setup	54s
Build lldb / Lit Tests (ubuntu-latest)	1h 58m 32s
Test llvm,clang,libclc / Lit Tests (ubuntu-latest)	2h 47m 23s
Test lld / Lit Tests (ubuntu-latest)	1h 6m 25s
Build lldb / Lit Tests (windows-2019)	1m 47s
Test llvm,clang,libclc / Lit Tests (windows-2019)	1m 29s
Test lld / Lit Tests (windows-2019)	1m 53s
Build lldb / Lit Tests (macOS-latest)	1h 6m 37s
Test llvm,clang,libclc / Lit Tests (macOS-latest)	1h 58m 43s
Test lld / Lit Tests (macOS-latest)	35m 43s
abi-dump (build-baseline)	30m 11s
abi-dump (build-latest)	31m 20s
abi-compare	30s
	10h 41m 27s

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