* [Coverage] Parse SIL coverage maps for top-level code decls
This adds SIL printer/parser support for SILCoverageMaps representing
top-level code decls.
* [Coverage] Test lowering of ill-formed SIL profiling intrinsics
This adds a test case to exercise a path in IRGen which discards
ill-formed profiling intrinsics.
rdar://40133800 & r://39146527
* Group tests for profiling instrumentation together, NFC
This will make it easier to test changes to the code coverage logic.
There are a handful of tests which relate to profiling which I have not
moved. These include tests for the driver and for the SIL optimizer. It
makes more sense to keep those tests where they are.
* Rename a test file, NFC
This file tests code coverage of primary files, so I've changed the name
of the file to reflect that.
* Simplify the check lines in a test, NFC
This file tests code coverage of closures. It had several check lines
which obscured the meaning of the test, and its check lines were in a
strange order.
Remove the extra checks and disable -emit-sorted-sil.
