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Skip oatdata and oatexec symbols in system@framework@boot.oat

Description

Skip oatdata and oatexec symbols in system@framework@boot.oat

On Android the oatdata and the oatexec symbols in
system@framework@boot.oat covers the full .text section what causes
issues with displaying unusable symbol name to the user and very slow
unwinding speed because the instruction emulation based unwind plans
try to emulate all instructions in these symbols. Don't add these
symbols to the symbol list as they have no use for the debugger and
they are causing a lot of trouble.

Differential revision: http://reviews.llvm.org/D11065

Details