SystemInformation: fix "Multi-character character constant"
SystemInformation: fix "Multi-character character constant"

Borland compiler correctly complains about this:

Warning W8098 SystemInformation.cxx 3773:
   Multi-character character constant in function
   SystemInformationImplementation::IsHyperThreadingSupported()
Warning W8098 SystemInformation.cxx 3775:
   Multi-character character constant in function
   SystemInformationImplementation::IsHyperThreadingSupported()
Warning W8098 SystemInformation.cxx 3777:
   Multi-character character constant in function
   SystemInformationImplementation::IsHyperThreadingSupported()

Change-Id: Id5b5411ed0d04d985dfc8235a6c8c817a4e12ccf

chuckatkins/KWSys,chuckatkins/KWSys,chuckatkins/KWSys,chuckatkins/KWSys