Fix e_f to print the saved errno.

Change-Id: I1ee366717759429f4c62432395344aa924f03183
Fix testsh1 execution in /usr/tests/minix-posix

Change-Id: Ib9ee7d9af72b5da2c6585cc11f80feefd4de5844
Importing usr.bin/wc

Change-Id: If174bd2bfc3ef38f21d45b5ba0567ac7d99dc608
Importing usr.bin/dirname

Change-Id: I83263576440c2040fb8ccd1e952abd53495fcb70
Importing usr.bin/basename

Change-Id: I2c71c83bc6a420390c4aed015373f78ebf425903
Importing usr.bin/expand

Change-Id: I4089d86d4ae1dcade0c82ed30ecd5685802acfd3
Importing usr.bin/unexpand

Change-Id: I2bab349ebccc28b14db446689171bce7dede8a9d
Importing usr.bin/xargs

Change-Id: I6a8ce6a8eee31942abb4db797672da7d00dfa43d
Importing usr.bin/tr

Change-Id: I4563198f111f2ec3687f6a5084edd05f243c2263