icc-gcc-toolfile: Do not die if icc paths are not available, just warn. Skip icc-* tools for cmssw-tool-conf

Signed-off-by: David Abdurachmanov <davidlt@cern.ch>
Merge pull request #50 from davidlt/IB/CMSSW_6_2_X/fc18_armv7hl_gcc480

[IB/CMSSW_6_2_X/fc18_armv7hl_gcc480] Fix ICC toolfile for ARM/OSX