Ignore clippy configuration flags.

Test: Ran ./all2android.sh under external/crosvm
Change-Id: I29a50ee242bca5111004b6ba56867b1e68ccd8f3

scripts/cargo2android.py

@@ -432,6 +432,9 @@ class Crate(object):
         self.emit_list = arg.replace('--emit=', '')
       elif arg.startswith('--edition='):
         self.edition = arg.replace('--edition=', '')
+      elif arg.startswith('\'-Aclippy'):
+        # TODO: Consider storing these to include in the Android.bp.
+        _ = arg # ignored
       elif not arg.startswith('-'):
         # shorten imported crate main source paths like $HOME/.cargo/
         # registry/src/github.com-1ecc6299db9ec823/memchr-2.3.3/src/lib.rs