For acp, we've been using an old prebuilt in prebuilts/sdk, but it's not
part of the SDK. Instead, we'll use a prebuilt in the build-tools
repository.
For ijar, we've been using the host libstdc++ to workaround the lack of
libc++ on some unbundled branches. Instead, use a prebuilt that can use
libc++.
For ziptime, we've been disabling it on unbundled branches, due to the
lack of libc++. Instead, use a prebuilt version of ziptime that can use
the prebuilt libc++.
Change-Id: If80f845ea06f76e3fe6765964e77c864eaf303d0
In preparation for including them in prebuilts/build-tools.
acp: We use a prebuilt in prebuilts/sdk, but it's not part of the sdk.
ijar: We use the host libstdc++ to workaround the lack of libc++ on
some unbundled branches.
ziptime: We disable this on unbundled builds, due to the lack of libc++.
Change-Id: Ib9766b1dbddd151c38ff27c529865200ab37fce1
