ARG_MAX on arm

[Marcel Moolenaar]

All,

As per rev 1.22 of src/sys/sys/syslimits.h, arm is the only platform
that has a maximum argument size of 64KB. This limit is too small
for "make delete-old" to work. For that reason I changed PowerPC to
use the same limit as all the other platforms. You may want to do
the same for arm if there's no particular reason to have it be 64KB.
FYI,

-- 
Marcel Moolenaar
xcllnt at mac.com