pcp

Add support for building PCP on Solaris 10

Unlike OpenSolaris Solaris 10 is not shipping with Bash as default shell
and does not include GNU utilities like tar, awk, tr etc. To cater for
its whims:

• change all entries which use export VAR=value to old fashioned VAR=value; export VAR
• try to look for gtar and gawk in preference of plain old awk and tar
• use old fashioned arguments for kill - Bourne Shell does not do -s
• don't try to escape quotes when processing variables in pcp.conf - pcp.env does its own quotes around values with spaces.
• finally, use old 32 bit counters when extracting information about UDP packet counters until I can figure out how to support new MIB2 interface.

The build is still using SunStudio compilers - gcc 3.4.3 which ships
with Solaris 10 is unable to generate 64bit DSOs which will load.