Small fixes to toolchain
- Make sure we do not pick up Gaudi from LCG by mistake. Now that LCG releases (may) contain a version of Gaudi, we have to exclude it from the toolchain to avoid clashes.
- Fixed check for
HEPTOOLS_VERSION
environment variable - More reliable detection of Intel Skylake processors (see lhcb-core/LbPlatformUtils!35 (merged))
CC: @mato
Edited by Marco Clemencic