backend/src/backend: Handle -dump-opt-llvm=[PATH] in clCompileProgram and clBuildProgram OpenCL API
backend/src/backend: Handle -dump-opt-llvm=[PATH] in clCompileProgram and clBuildProgram OpenCL API

This is a resubmission of the patch with support for LLVM 3.4
Allows the user to request a dump of the LLVM-generated IR to the file
specified in [PATH] through clCompileProgram options

Signed-off-by: Manasi Navare <f124e76fbe500bf1335279627793be517809ba5a@intel.com>
Reviewed-by: Guo, Yejun <1f883e24fa2949df61a83c432caa290810cece11@intel.com>

wdv4758h/beignet,wdv4758h/beignet,wdv4758h/beignet,wdv4758h/beignet,wdv4758h/beignet