Remove special versioning suffix rules for CUDA 10.2 (#4065)

* packaging: Remove special versioning priveleges

Adds a version suffix for CUDA 10.2 for ease of installing when
installing from download.pytorch.org
Signed-off-by: Eli Uriegas <eliuriegas@fb.com>

* also include windows cmath fix
Signed-off-by: Eli Uriegas <eliuriegas@fb.com>

* remove comment
Signed-off-by: Eli Uriegas <eliuriegas@fb.com>

* fix indent
Signed-off-by: Eli Uriegas <eliuriegas@fb.com>

* actually add the script
Signed-off-by: Eli Uriegas <eliuriegas@fb.com>

packaging/pkg_helpers.bash

@@ -35,10 +35,7 @@ setup_cuda() {
   export WHEEL_DIR=""
   # Wheel builds need suffixes (but not if they're on OS X, which never has suffix)
   if [[ "$BUILD_TYPE" == "wheel" ]] && [[ "$(uname)" != Darwin ]]; then
-    # The default CUDA has no suffix
-    if [[ "$CU_VERSION" != "cu102" ]]; then
-      export PYTORCH_VERSION_SUFFIX="+$CU_VERSION"
-    fi
+    export PYTORCH_VERSION_SUFFIX="+$CU_VERSION"
     # Match the suffix scheme of pytorch, unless this package does not have
     # CUDA builds (in which case, use default)
     if [[ -z "$NO_CUDA_PACKAGE" ]]; then