Fix unhandled SIGTRAP signal on Linux causing assertion.


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@186112 91177308-0d34-0410-b5e6-96231b3b80d8
Adds methods to ObjectFileELF to access data in ELF segments
in preparation to add support for ELF core files.

Patch by Samuel Jacob!


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@186114 91177308-0d34-0410-b5e6-96231b3b80d8