Include the support library when linking various test programs, because on

Include the support library when linking various test programs, because on
Solaris, with the vendor compiler, we'll always get references to
krb5int_pthread_loaded due to unused inline functions not being eliminated.

(Also inclued it in dependencies, and use CC_LINK when it wasn't used before.)

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@17592 dc483132-0cff-0310-8789-dd5450dbe970