android: allow system = 'android' on cross file

Allow building with system = 'android' on the cross file.
This avoids creating symlinks for the libs.

Suggested-by: Roman Stratiienko <r.stratiienko@gmail.com>
Suggested-by: David Heidelberg <david.heidelberg@collabora.com>
Signed-off-by: Helen Koike <helen.koike@collabora.com>
Reviewed-by: Sergi Blanch Torné <sergi.blanch.torne@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20019>
2 files changed