Don't use the option -hipa2 for CCE backend compiler
Don't use the option -hipa2 for CCE backend compiler

The -hipa2 option was originally added to limit the amount of inlining done
by the backend compiler when we used CCE's default optimization level (-O2)
by default.

Now that we use -O0 by default for CCE, -hipa2 actually dramatically
increases the amount of inlining done vs. not using the option.  Remove
-hipa2 from make/compiler/Makefile.cray-prgenv-cray.

CoryMcCartan/chapel,CoryMcCartan/chapel,hildeth/chapel,hildeth/chapel,hildeth/chapel,CoryMcCartan/chapel,hildeth/chapel,chizarlicious/chapel,chizarlicious/chapel,chizarlicious/chapel,CoryMcCartan/chapel,chizarlicious/chapel,chizarlicious/chapel,hildeth/chapel,hildeth/chapel,CoryMcCartan/chapel,CoryMcCartan/chapel,chizarlicious/chapel,hildeth/chapel,CoryMcCartan/chapel,chizarlicious/chapel