Add copyright headers in a few files where they were missing.
Trim trailing blank comment line where present, for consistency with
other engine code.
Use the standard libtxt copyright header in one file where it differed
(extra (C) and comma compared to other files in libtxt).
This also amends tools/const_finder/test/const_finder_test.dart to look
for a const an additional four lines down to account for the copyright
header added to the test fixture.
* "Reland Clang 11, roll buildroot to 1bc40a5f916adb93d87e2a2230a0ec43db876c1c, take 4 (#17467)" (#17482)"
This reverts commit 8166a91bca11b83c16fba8f8fd407e937a2ac89c.
* format code
* Roll buildroot to 3a27de1c5bb0f50be7d3efe3e00de4f6068c9f30
* Reland Clang 11, Roll buildroot to 1bc40a5f916adb93d87e2a2230a0ec43db876c1c (#17457)" (#17464)
This reverts commit 9eacd028cdba5c6efef327342dc53fab61474462.
* Skip more image tests, use newer dsymutil, add missing symbols
* Reland "Roll Clang to v11, roll buildroot to fe13f79dce4ce9aab3209f11988d825dcf580b4a, allow newly exported symbols (#17440)" (#17451)"
This reverts commit a870bc533c5bce9526563c3d2f40370e450b85f6.
* skip golden that is different on macos
* buildroot to 1bc40a5f916adb93d87e2a2230a0ec43db876c1c
