Sync tools with NetBSD-current

[marceloalencar]

Update required tools for newer hosts (GCC 10, for example), which also updates userland with latest NetBSD versions of:

• make
• xinstall
• pax (also updates tar, cpio)
• binutils (also updates libbfd, libopcodes, and adds libgnuctf)
• makefs (also updates /sbin/newfs_udf, /sys/fs/udf/ and /sys/fs/msdosfs)
• installboot

This fixes #316. It is required to apply #310 while LLVM/clang isn't updated.

[marceloalencar]

Running test suite on i386:

# cd /usr/tests/minix-posix
# ./run

Output: All 101 tests completed without error (0 skipped).