p4pcm.pl v1.1.7: Adjusted shebang line.
The prior shebang line forced usage of /p4/common/perl/bin/perl. At one
point in history that was more reliably available, when building a
self-contained Perl in the SDP was more common. But no longer.
The shebang line now finds perl from PATH. The default SDP path still
prefers /p4/common/perl/bin, so if a perl exists there it will be used.
This change will have no functional impact to existing
installations that have and user /p4/common/perl, but will not require
new installstions to build a self-contained perl.