Commit 6e9d43e085c01969a0e117e6b953de868e6c9e9e

DRC 2016-07-06T16:58:28

Linux/PPC: Only enable AltiVec if CPU supports it This eliminates "illegal instruction" errors when running libjpeg-turbo under Linux on PowerPC chips that lack AltiVec support (e.g. the old 7XX/G3 models but also the newer e5500 series.)