Check in inline and test

include/tvm/ir.h

include/tvm/ir_pass.h

python/tvm/__init__.py

python/tvm/_ctypes/_api.py

python/tvm/ir_pass.py

src/c_api/c_api.cc

src/c_api/c_api_ir.cc

src/c_api/c_api_lang.cc

src/c_api/c_api_pass.cc

src/c_api/c_api_registry.h

src/lang/tensor.cc

src/pass/inline.cc

src/pass/ssa.cc

tests/cpp/ir_ssa_test.cc

tests/python/test_inline.py

tests/python/test_ir_pass.py