Modified the symbolicate-crash.py so it can be imported into python as a

module (you can't import a module with a '-' in it) and also added a
Symbolcate(...) top level function so it can be imported and used as an
LLDB command.

Then you can import the module and map a "crashlog" command (for darwin
use only currently) to the python function "crashlog.Symbolicate":

(lldb) script import crashlog
(lldb) command script add -f crashlog.Symbolicate crashlog

Then use it to symbolicate:

(lldb) crashlog --crash-log /path/to/foo.crash

The crash log will then get symbolicated and inline frames will be added to
the crash log and the frames will be displayed. The crash log currently will
only try and fetch and setup the target images requires in order to do the
symbolication.

This will need to be iterated upon, but it is getting close to being useful
so I am going to check this in.

llvm-svn: 148528