WinRT components need to be referenced in a similar way that managed
code libraries are referenced. Validate that the library reference is a
WinRT component and reference it through the project.
Add test coverage for `VS_WINRT_COMPONENT`. While at it, fix the IOT
reference failing on Win10 SDK 17763 which doesn't include it anymore.
Fixes: #18846
Run the `Utilities/Scripts/clang-format.bash` script to update
all our C++ code to a new style defined by `.clang-format`.
Use `clang-format` version 3.8.
* If you reached this commit for a line in `git blame`, re-run the blame
operation starting at the parent of this commit to see older history
for the content.
* See the parent commit for instructions to rebase a change across this
style transition commit.
These tests use a precompiled header that must be included first.
Include the header in an isolated block so that tools that sort
includes do not move it.
