[libclang] [OpenCL] Expose more OpenCL CIndex types

Expose pipe, sampler_t, clk_event_t, queue_t, reserve_id_t, and all
image types.

Update the opencl-types.cl test RUN line such that we can test the
OpenCL 2.0 types.

Patch by Simon Perretta.

Differential Revision: https://reviews.llvm.org/D33197

llvm-svn: 303626