Update llvm version used for MSAN. #5090

Job	Run time
Ubuntu GCC	14s
Ubuntu 20.04 GCC	11s
Ubuntu GCC OSB	14s
Ubuntu GCC Compat No Opt	7s
Ubuntu GCC ARM SF	23s
Ubuntu GCC ARM SF Compat No Opt	22s
Ubuntu GCC ARM HF	25s
Ubuntu GCC ARM HF No ACLE	29s
Ubuntu GCC ARM HF No NEON	23s
Ubuntu GCC ARM HF Compat No Opt	29s
Ubuntu GCC AARCH64	25s
Ubuntu GCC AARCH64 No ACLE	32s
Ubuntu GCC AARCH64 No NEON	31s
Ubuntu GCC AARCH64 Compat No Opt	27s
Ubuntu GCC MIPS	21s
Ubuntu GCC MIPS64	32s
Ubuntu GCC PPC	20s
Ubuntu GCC PPC No Power8	23s
Ubuntu GCC PPC64	20s
Ubuntu GCC PPC64LE	27s
Ubuntu GCC S390X	20s
Ubuntu GCC S390X No vectorized CRC32	20s
EL9 GCC S390X DFLTCC	8s
EL9 GCC S390X DFLTCC Compat	7s
Ubuntu Emscripten WASM32	45s
macOS GCC Symbol Prefix	1m 7s
macOS GCC Symbol Prefix (ARM64)	23s
macOS GCC Symbol Prefix & Compat	50s
macOS GCC Symbol Prefix & Compat (ARM64)	24s
macOS GCC	51s
macOS GCC (ARM64)	22s
	13m 12s

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