lib/calib.c: Include <sys/sysmacros.h> for fstat()
lib/calib.c: Include <sys/sysmacros.h> for fstat()

Relying on <sys/types.h> to define major(), minor() and makedev() is
deprecated, so include <sys/sysmacros.h> to define them.

Als include <sys/types.h> and <unistd.h> as the Linux man page for
fstat() has them in the synopsys.

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