fix(toolchain): Also set Make variables for local toolchains#3641

jwnimmer-tri wants to merge 1 commit intobazel-contrib:mainbazel-contrib/rules_python:mainfrom

jwnimmer-tri:local-toolchain-make-variable-substitutionjwnimmer-tri/rules_python:local-toolchain-make-variable-substitutionCopy head branch name to clipboard