Add back-and-forth inflateCopy() test #185

Job	Run time
Ubuntu GCC	22s
Ubuntu 20.04 GCC	11s
Ubuntu GCC OSB	17s
Ubuntu GCC Compat No Opt	9s
Ubuntu GCC ARM SF	29s
Ubuntu GCC ARM SF Compat No Opt	21s
Ubuntu GCC ARM HF	23s
Ubuntu GCC ARM HF No ACLE	25s
Ubuntu GCC ARM HF No NEON	23s
Ubuntu GCC ARM HF Compat No Opt	23s
Ubuntu GCC AARCH64	24s
Ubuntu GCC AARCH64 No ACLE	31s
Ubuntu GCC AARCH64 No NEON	46s
Ubuntu GCC AARCH64 Compat No Opt	34s
Ubuntu GCC MIPS	20s
Ubuntu GCC MIPS64	26s
Ubuntu GCC PPC	21s
Ubuntu GCC PPC No Power8	24s
Ubuntu GCC PPC64	36s
Ubuntu GCC PPC64LE	24s
Ubuntu GCC S390X	20s
Ubuntu GCC S390X No vectorized CRC32	33s
Ubuntu GCC S390X DFLTCC	33s
Ubuntu GCC S390X DFLTCC Compat	25s
Ubuntu Emscripten WASM32	39s
macOS GCC Symbol Prefix	55s
macOS GCC Symbol Prefix (ARM64)	21s
macOS GCC Symbol Prefix & Compat	53s
macOS GCC Symbol Prefix & Compat (ARM64)	21s
macOS GCC	45s
macOS GCC (ARM64)	20s
	14m 14s

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