refs #100891 Drop use of GCC variable in favor of existing variable CC.
refs #100891 Drop use of GCC variable in favor of existing variable CC.

The CC default is set when 'configure' is run.  If someone wishes to override the toolchain
used they can set a new value, which will support cross compilation
scenarios.

svartika/ccnx,cawka/ndnx,cawka/ndnx,svartika/ccnx,svartika/ccnx,cawka/ndnx,cawka/ndnx,svartika/ccnx,svartika/ccnx,svartika/ccnx,cawka/ndnx,svartika/ccnx