[BUILD] rename build.py to avoid conflict name of build (#284)

* __init__ updated

* pull request updated

* build_module added

* typo fixed

* another typo fixed

python/tvm/__init__.py

@@ -27,5 +27,5 @@ from .tensor_intrin import decl_tensor_intrin
 from .node import register_node
 from .ndarray import register_extension
 from .schedule import create_schedule
-from .build import build, lower, build_config
+from .build_module import build, lower, build_config
 from .tag import tag_scope

python/tvm/tensor_intrin.py

@@ -6,7 +6,7 @@ from . import expr as _expr
 from . import stmt as _stmt
 from . import make as _make
 from . import tensor as _tensor
-from .build import BuildConfig
+from .build_module import BuildConfig
 from ._ffi.node import NodeBase, register_node
 
 @register_node