Document the arm-fpu-fix rebase in 5.9.2-1
    
    - arm-fpu-fix patch: Drop the host tools hunk added in 5.9.0-2, fixed upstream
    
    Also rename the patch file from
    qtwebengine-opensource-src-5.9.0-arm-fpu-fix.patch to
    qtwebengine-opensource-src-5.9.2-arm-fpu-fix.patch because the patch was
    rebased. Otherwise, it is easy to miss that the patch was rebased. (I
    did, I only noticed it now while working on the RPM Fusion package. And
    I might easily have missed it again and run into a build failure due to
    that.)