ANDROID: Make musl libc soname configurable

Make the soname that the musl linker expects for libc configurable
so we can build a version that will work in a host sysroot for
use outside the platform, for example when building toolchains.

Bug: 190084016
Test: m USE_HOST_MUSL=true host-native
Change-Id: Id585671948fcc6a87b86d66ac4cef9696a4b69a7
2 files changed