portage: add more config files

This allows us to override profile settings further:
- switch from ELIBC=glibc to ELIBC=bionic
- disable glib[mime] to avoid fat mime/xml deps
- disable USE=static-libs by default so we only use shared libs
- omit the charset.alias file from all packages as random GNU packages
  all want to install it (which breaks due to collisions), and the
  content is pretty pointless (maps like 2 obscure aliases)

Change-Id: I3bfa4ba2487257e59410f54da3c5596258462b8f
5 files changed
tree: 00da81ff4d524ccb4be42bfb0c4ad646e3bf7b8f
  1. 3rd-party-binary.mk
  2. Android.mk
  4. TODO
  5. portage/
  6. tests/
  7. toolchain/