[SizzleUnrlsd]

Refs #249

Summary

cmake --install installed bin/cc, the libraries in lib/ and include/, but neither LICENSE nor NOTICE. Apache-2.0 sets two conditions on redistribution:

• Section 4(a): recipients must be given a copy of the License.
• Section 4(d): Derivative Works must carry the attribution notices of NOTICE.

An install prefix copied or packaged as it is carried neither file.

Change

• CMakeLists.txt: install(FILES LICENSE NOTICE DESTINATION share/doc/coretrace-compiler COMPONENT licenses). A plain cmake --install installs every component, these files included. The licenses component lets a test install them alone, without building anything.
• README: its Install section lists the two files.

Test

Install.ShipsLicenseAndNotice (test/unit/check_installed_licenses.cmake) installs the licenses component of the build tree into a temporary prefix. It passes --config when a multi-config generator built the tree. It then fails unless share/doc/coretrace-compiler/LICENSE and NOTICE exist and match the sources byte for byte.

The test lands first as an expected failure (WILL_FAIL), which the fix removes. Run locally on macOS, on a configured build tree with nothing built:

	Result
Before the install rule (script run directly)	cmake --install succeeds and installs nothing; the test fails on not installed: share/doc/coretrace-compiler/LICENSE
After	passes; the prefix holds LICENSE and NOTICE
A NOTICE in the sources that differs from the installed one	fails on differs from NOTICE of the sources

In CI at aa57784, which merges main after #248, the test passes in the 18 jobs that run the test suite:

• the 15 jobs of LLVM versions run 42518411780, on Linux, macOS and Windows;
• three jobs of Build run 42518411816: without the runtime, with coverage, and with AddressSanitizer and UBSan.

It passed in the same jobs at 28ea589, before that merge (42394558228, 42394558175).

The ThreadSanitizer job runs the runtime's tests only, and the Docker job is skipped on pull requests. test/examples/test_install_layout.py, which installs everything, passes too. clang-format, license-compliance and the commit conventions pass.

Not covered

• CoreTrace/coretrace's install: it fetches this project through its analyzers, and installs this project's LICENSE and NOTICE from the sources itself. Whether its cmake --install now also gets share/doc/coretrace-compiler/ was not checked.
• The license-compliance check: it still does not check NOTICE.