Notable changes:
 * Fixed instances of bugprone-move-forwarding-reference.
   See: https://swiftshader-review.googlesource.com/c/SwiftShader/+/48868
        chromium:1134310
 * Fiber stack size can now be configured.
 * Only public API symbols are now exported, allowing for creation of
   shared libraries / dlls.

Changes:
    f1c446ccdc0 Fix instances of bugprone-move-forwarding-reference
    8719a54cbe0 Kokoro: Get tar directories around the right way!
    3a21f30c54e Kokoro: Package build artifacts into a .tar
    57da063f48f Kokoro: Fix line continuation in release.bat
    ecaa2602da1 Kokoro: Rename release script names
    787cf0686d2 Kokoro: Add release configs
    3ce8637191a Kokoro: Test ucontext fibers on linux.
    62f0a0f9e39 osfiber_ucontext: Fix memory leak & warning
    20dc482b9a0 CMake: Add flag for ucontext fibers
    3815666523e Kokoro: Fix define_artifacts.regex
    f51513856b6 Kokoro: Add define_artifacts action
    d2d77650ec1 CMake: Put marl-benchmarks in a named FOLDER
    95e505a3071 Fix markdown lint warnings in README.md
    71d86a2bc04 Kokoro: Add config for continuous + so builds
    5f897319c18 Reduce scheduler fiber stack size for tests
    bc65ef5ebe5 Scheduler: Make the fiber stack size configurable
    b61e279881c Remove deprecated scheduler [gs]etters
    1a28daf0d89 Add license checker config and kokoro presubmit
    3448974c1b0 Add marl::DAG - a AoT declarative task graph
    9e77dcdd5a4 Kokoro: Migrate to new Windows VM instance
    ac517aa6784 Fix schedule() with function arguments
    834e558a138 Add missing include to export.h
    1e8acb5695e MSVC build fixes.
    84f047c114c Migrate from VERSION to CHANGES.md
    0a1012317ab Annotate all public API inlines with MARL_NO_EXPORT
    3689793cb1d Only notify one fiber in ConditionVariable::notify_one()
    596e172322d CMake: Use -fvisibility=hidden by default
    1d51df92c71 Disable by default deprecated scheduler [gs]etters
    45be9b24830 README: Add FreeBSD and iOS to the list of OSes
    4d68ade048a Export DLL public symbols for building marl as dll
    1efb1e70228 Kokoro: Add configs for Android

Commands:
    ./third_party/update-marl.sh --squash

Bug: b/140546382
Bug: chromium:1134310
Change-Id: I48e99f1100d9a1e92a2b34c5764b5c604a1f2fe8