Just warn with unexpected CHPL_HOME vs pwd
Just warn with unexpected CHPL_HOME vs pwd

I noticed this error-checking was failing
in an environment where /home also
has another name.. and Brad had mentioned
problems with it earlier as well. So
now it just warns instead of bailing out.
 


git-svn-id: 88467cb1fb04b8a755be7e1ee1026be4190196ef@19638 3a8e244f-b0f2-452b-bcba-4c88e055c3ca

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