Support building python pars against musl libc by either adding
libc_musl as an install dependency or using the static version
of the python launchers.
Bug: 179809553
Test: m USE_HOST_MUSL=true apexer deapexer
Test: m USE_HOST_MUSL=true BUILD_HOST_static=true apexer deapexer
Change-Id: I4a56efb227bea746836eb785d929eb4b5d8e15f1