linux_iocparm_len in io.c is ifdef __linux__, but uses glibc specifics
Third Party's Issue
2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN
_IOC_SIZE is glibc specific, thus compilation fails with musl libc.
- io.c (linux_iocparm_len): enable only exist _IOC_SIZE(). Because musl libc doesn't have it. [Bug #8051]