Way back in Swift 1 I was trying to draw a distinction between
"overlays", separate libraries that added Swift content to an existing
Objective-C framework, and "the Swift part of a mixed-source
framework", even though they're implemented in almost exactly the same
way. "Adapter module" was the term that covered both of those. In
practice, however, no one knew what "adapter" meant. Bring an end to
this confusion by just using "overlay" within the compiler even for
the mixed-source framework case.
No intended functionality change.
The OS sadly changes between Android ARMv7 and Android AArch64, to
avoid this and any future problems, mark the autolinking tests that
I can find with `UNSUPPORTED: autolink-extract`, which should apply
to all platforms that need autolink-extract.
This should remove these tests from failing in Android 64.
This is unfortunate in that it makes the linker do extra work, but in
practice it probably doesn't matter much, and meanwhile it handles all
our problems with @inlinable.
Alternate solution to rdar://problem/39338239
This enables additional tests for the ClangImporter. This found a
missing piece in the `-enable-objc-interop` work that was done
previously. Address that and enable the tests. There are now the
following failing tests on Linux:
* sdk - depends on Foundation (not hermetic, see SR-7572)
* mixed-nsuinteger - depends on Foundation (not hermetic, see SR-7572)
* import-mixed-with-header-twice - requires apple/swift PR#16022
* can_import_objc_idempotent - requires apple/swift PR#16022
* objc_protocol_renaming - requires apple/swift PR#16022
