Add online compilation for dynamic kernels (#37)

* Add online-compiling facility

* Synchronize from fwd-v4r5 and implement host interfaces to call conv-fwd v4r4/v4r5 using on-line compiling method

* Tiny adjustment to time reporting

* Use object assignment to replace explicit bytes copying in the first kernel of v4r4/v4r5

* Use single thread to assign descriptor object to device memory

* Adjust to the workload assignment of the two kernels of v4r4 (experimental)

* Revert "Adjust to the workload assignment of the two kernels of v4r4 (experimental)"

This reverts commit eb38461456bb0c82b6c0d32cdd616e181907e20c.

* Update to make constexpr for generating descriptor types in kernel 2 of dynamic conv-fwd v4r4

* Update to dynamic conv-fwd v4r4 online-compiling

* Update to dynamic conv-fwd v4r5 online-compiling (result not accurate)

* Tiny update to driver/CMakeLists.txt

* clang-format

* Tiny comments change

* Add env OLC_DUMP_SAVE_TMP_DIR to support saving of temperary di...

driver/olCompiling/kernels_batch.cpp.in

+#include "${KERNEL_SRC_HPP_FILENAME}"