[PATCH] Simplify format of profile input file.

[Diego Novillo]

Hi chandlerc,

This implements earlier suggestions to simplify the format of
the sample profile file. The symbol table is not necessary and
function profiles do not need to know the number of samples in
advance.

OK to commit?

http://llvm-reviews.chandlerc.com/D2419

Files:
  lib/Transforms/Scalar/SampleProfile.cpp
  test/Transforms/SampleProfile/Inputs/bad_fn_header.prof
  test/Transforms/SampleProfile/Inputs/bad_sample_line.prof
  test/Transforms/SampleProfile/Inputs/branch.prof
  test/Transforms/SampleProfile/Inputs/calls.prof
  test/Transforms/SampleProfile/Inputs/missing_num_syms.prof
  test/Transforms/SampleProfile/Inputs/missing_samples.prof
  test/Transforms/SampleProfile/Inputs/missing_symtab.prof
  test/Transforms/SampleProfile/Inputs/propagate.prof
  test/Transforms/SampleProfile/Inputs/syntax.prof
  test/Transforms/SampleProfile/syntax.ll
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