Add support for statvfs() to FUSE #2198

Job	Run time
code formatting check	19s
cppcheck	4m 20s
min features with gcc	2m 36s
min features with g++	2m 17s
min features with clang	2m 20s
max features with gcc	3m 18s
max features with g++	2m 46s
max features with clang	4m 0s
max features with clang and AddressSanitized	5m 48s
max features with gcc and DEBUG	9m 19s
max features with gcc for 32-bit arch (legacy OS)	1m 31s
max features with g++ for 32-bit arch (legacy OS)	1m 53s
max features with clang for 32-bit arch (legacy OS)	1m 49s
	42m 16s

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