Fix Longtail_OpenAppendFile on Linux (#244) #230

Job	Run time
test-linux (debug)	47s
test-darwin (debug, arm64)	44s
test-linux (release)	53s
test-darwin (debug, x64)	58s
build-linux (debug, static_lib)	24s
build-darwin (debug, static_lib, arm64)	29s
test-darwin (release, arm64)	59s
build-linux (debug, shared_lib)	25s
build-darwin (debug, static_lib, x64)	29s
build-win32 (debug, static_lib)	39s
test-darwin (release, x64)	55s
build-linux (debug, cmd)	36s
build-darwin (debug, shared_lib, arm64)	36s
build-linux (release, static_lib)	1m 18s
build-win32 (debug, shared_lib)	51s
build-darwin (debug, shared_lib, x64)	38s
build-win32 (debug, cmd)	27s
build-linux (release, shared_lib)	47s
build-darwin (debug, cmd, arm64)	42s
build-win32 (release, static_lib)	1m 47s
build-linux (release, cmd)	56s
build-darwin (debug, cmd, x64)	40s
build-win32 (release, shared_lib)	1m 16s
test-win32 (debug)	43s
build-darwin (release, static_lib, arm64)	55s
test-win32 (release)	1m 40s
build-win32 (release, cmd)	54s
build-darwin (release, static_lib, x64)	59s
build-darwin (release, shared_lib, arm64)	53s
build-darwin (release, shared_lib, x64)	52s
build-darwin (release, cmd, arm64)	1m 0s
build-darwin (release, cmd, x64)	51s
dist-linux	11s
dist-win32	15s
dist-darwin (arm64)	14s
dist-darwin (x64)	16s
	27m 59s

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