Corrected definitions of 32/64-bit sensitive types in clc.h.
event_t now defined as size_t.
spir-unknown-unknown used for programs and PCH files if on 32-bit.
Implemented 'dump' specifier for oclgrind-kernel argument definitions.
All error information should go to cerr.
Tests now use 'dump' specifier to avoid memory address comparisons.
Fixed checks for 32-bit compilation target.