Eliminate rendundant definintions of Intel debug variable
Two additional definitions of INTEL_DEBUG were added as a result of a circular dependency between libintel_common and libintel_compiler.
INTEL_DEBUG is the only symbol from libintel_common that is needed by the compiler lib. The cycle is broken by moving INTEL_DEBUG to libintel_dev.
Unfortunately, there are many references to this variable that need to be updated.