Add breakpoint instruction byte sequences for arm to
PlatformLinux::GetSoftwareBreakpointTrapOpcode.

Patch by Stephane Sezer.
http://reviews.llvm.org/D5923


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@220762 91177308-0d34-0410-b5e6-96231b3b80d8