renamed some files in cmake module test data
Replaced 'x86_64-slc6-gcc48-opt' with 'x86_64-slc0-gcc99-opt' to avoid possible clashes with real platform strings.
Replaced 'x86_64-slc6-gcc48-opt' with 'x86_64-slc0-gcc99-opt' to avoid possible clashes with real platform strings.