cmd/ld: report pclntab, funcdata sizes in 6l -v output
Also move chatty recent additions to -v -v. For what it's worth: $ go build -o /dev/null -ldflags -v cmd/go ... 0.87 pclntab=1110836 bytes, funcdata total 69700 bytes ... $ This broke the ELF builds last time because I tried to dedup the funcdata in case the same funcdata was pointed at by multiple functions. That doesn't currently happen, so I've removed that test. If we start doing bitmap coalescing we'll need to figure out how to measure the size more carefully, but I think at that point the bitmaps will be an extra indirection away from the funcdata anyway, so the dedup I used before wouldn't help. R=ken2 CC=golang-dev https://golang.org/cl/12269043
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