A bunch of fix#25

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Commits on Jul 7, 2015

Enable generating profile for clang LTO enabled binary.
yuanfang-chen
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[Bugfix] Size of DW_FORM_ref_addr in both DWARF2 and DWARF3 are both offset size
yuanfang-chen
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[Bugfix] Inlined function has offsets relative to first line of file in
yuanfang-chen
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