[AddressSanitizer] Analyze parallel-promotable allocas before ASan's … #231

Job	Run time
Build lldb / Lit Tests (ubuntu-latest)	23m 43s
Test llvm,clang,libclc / Lit Tests (ubuntu-latest)	1h 28m 37s
Build lldb / Lit Tests (macOS-11)	27m 53s
Test lld / Lit Tests (ubuntu-latest)	23m 13s
Test llvm,clang,libclc / Lit Tests (macOS-11)	2h 58m 55s
Test lld / Lit Tests (macOS-11)	38m 39s
	6h 21m 0s

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