v4 of perf weight annotation

Andi Kleen <[email protected]>
Newsgroups org.kernel.vger.linux-perf-users
Message-ID <[email protected]>
This patchkit display weights in perf annotate. 

Changes in v4:

Address review comments (except for some Sashiko nitpick)
Support no-weights for perf report too
Rename the symbol_conf flag
PPC and x86 now report correct field names (using ifdef)
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