make signapk strip other signatures

Change signapk to not propagate other signatures to the output
archive.  Multiple signatures seem to confuse the package manager, as
we saw with Maps, and other partners are checking in prebuilt APKs for
google experience devices signed with random other things.
1 file changed
tree: aacaca7416e4ebc0deece70898a30f9e919a0708
  1. core/
  2. libs/
  3. target/
  4. tools/
  5. buildspec.mk.default
  6. cleanspec.mk
  7. envsetup.sh