Fix symbol resolution within a dex file.

Fixes the ART 137-cfi test, currently failing on buildbot.

Test: testrunner.py -j40 --host --cdex-none -t 137 -b
Change-Id: I16a007b291702207bbd003fd1e78e8e5ced7cd68
diff --git a/libunwindstack/Unwinder.cpp b/libunwindstack/Unwinder.cpp
index d22e1e8..db8278e 100644
--- a/libunwindstack/Unwinder.cpp
+++ b/libunwindstack/Unwinder.cpp
@@ -95,7 +95,8 @@
   }
 
 #if !defined(NO_LIBDEXFILE_SUPPORT)
-  dex_files_->GetMethodInformation(dex_offset, info, &frame->function_name, &frame->function_offset);
+  dex_files_->GetMethodInformation(dex_pc - dex_offset, dex_offset, info, &frame->function_name,
+                                   &frame->function_offset);
 #endif
 }