NF: add distutils platform check

To get pip's platform.

common_utils.sh

@@ -299,6 +299,12 @@ function get_platform {
     python -c 'import platform; print(platform.uname()[4])'
 }
 
+function get_distutils_platform {
+    # Report platform as given by distutils get_platform.
+    # This is the platform tag that pip will use.
+    python -c "import distutils.util; print(distutils.util.get_platform())"
+}
+
 function install_wheel {
     # Install test dependencies and built wheel
     #

tests/test_common_utils.sh

@@ -88,3 +88,7 @@ set_opts $ORIG_OPTS
 
 # On Linux docker containers in travis, can only be x86_64 or i686
 [ "$(get_platform)" == x86_64 ] || [ "$(get_platform)" == i686 ] || exit 1
+
+# Crudest possible check for get_distutils_platform
+expected=$(python -c "import distutils.util as du; print(du.get_platform())")
+[ "$(get_distutils_platform)" == "$expected" ] || ingest "bad distutils platform"