- Annocheck: Suppress more tests for Rust binaries.
    - Annocheck: Fix detection of missing plugin options.  (#2189492)
    - Fix generation of auto-generated files.
    - Fix covscan reported errors.
    - gcc-plugin: generate warnings about misspelt -D_FORTIFY_SOURCE and/or -D_GLIBCXX_ASSERTIONS options.
    - gcc-plugin: use a bigger buffer for constructing notes.
    - llvm-plugin: Fix detection of optimization level.  Improve test.
    - clang-plugin: Improve test.
    - configure: More improvements.
    - annocheck: Fix seg-fault when checking for glibc components in string format notes.
    - configure: Simplify.