support comments

E.g.

    cat <<EOF | go run tools/fm/fm_bot.go -processLimit 0 -quiet -script - out/fm
        b=cpu gms ct=8888 w=$WHERE/8888 legacy=true  # old and busted
        b=cpu gms ct=8888 w=$WHERE/srgb              # new hotness
    EOF

Change-Id: Ia92ba113ae95478313e1f2cc18b7270ea1aa8a42
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/205831
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
1 file changed