Fix the use of lldb::eSymbolContextVariable.

In Address.cpp, we were asking for the lldb::eSymbolContextVariable to be resolved, yet we weren't using the variable. This code gets called when disassembling and can cause the manual creation of all global variables variables which can take minutes. Removing eSymbolContextVariable allows disassembly to not create these long pauses.

In Module.cpp, if someone only specified the lldb::eSymbolContextVariable flag, we would not look into a module's debug info, now we will.

<rdar://problem/26907449>

llvm-svn: 273307