Fix cu100 smokes

Signed-off-by: Edward Z. Yang <ezyang@fb.com>

smoke_test.sh

@@ -56,11 +56,12 @@ elif [[ "$DESIRED_CUDA" == 'cpu' && "$(uname)" != 'Darwin' ]]; then
 else
   package_name='pytorch-nightly'
 fi
-if [[ "$(uname)" == 'Darwin' ]]; then
+if [[ "$(uname)" == 'Darwin' ]] || [[ "$DESIRED_CUDA" == "cu100" ]]; then
   package_name_and_version="${package_name}==${NIGHTLIES_DATE_PREAMBLE}${DATE}"
 else
   # Linux binaries have the cuda version appended to them. This is only on
-  # linux, since all macos builds are cpu.
+  # linux, since all macos builds are cpu.  (NB: We also omit
+  # DESIRED_CUDA if it's the default)
   package_name_and_version="${package_name}==${NIGHTLIES_DATE_PREAMBLE}${DATE}+${DESIRED_CUDA}"
 fi