Use wide dbghelp routines in drsyms when passing paths
Use wide dbghelp routines in drsyms when passing paths

This should make it possible to load syms for a file with a non-ASCII path, but
I haven't been able to construct a satisfying test.

Review URL: https://codereview.appspot.com/7388044

git-svn-id: ed337ca7cdb08c0ba29d8fe58632bb7686892c2d@1928 49cc7528-f6fd-11dd-9d1a-b59b2e1864b6

rnk/dynamorio,rnk/dynamorio,rnk/dynamorio,rnk/dynamorio,rnk/dynamorio