[Build][Release] Windows release fixes (#650)

* bump up version

* conda+cuda trial

* switch conda branch

* revert

* disable cudnn

* windows cuda arch fix

* more fix

conda/dgl/bld.bat

@@ -3,7 +3,7 @@ git submodule init
 git submodule update
 md build
 cd build
-cmake -DUSE_CUDA=%USE_CUDA% -DUSE_OPENMP=ON -DCMAKE_CXX_FLAGS="/DDGL_EXPORTS" -DCMAKE_CONFIGURATION_TYPES="Release" .. -G "Visual Studio 15 2017 Win64" || EXIT /B 1
+cmake -DUSE_CUDA=%USE_CUDA% -DUSE_OPENMP=ON -DCUDA_ARCH_NAME=All -DCMAKE_CXX_FLAGS="/DDGL_EXPORTS" -DCMAKE_CONFIGURATION_TYPES="Release" .. -G "Visual Studio 15 2017 Win64" || EXIT /B 1
 msbuild dgl.sln || EXIT /B 1
 COPY Release\dgl.dll .
 cd ..\python

conda/dgl/meta.yaml

 package:
-  name: dgl{{ environ.get('DGL_PACKAGE_SUFFIX') }}
+  name: dgl{{ environ.get('DGL_PACKAGE_SUFFIX', '') }}
   version: "0.3"
 
 source: