Fix the stack script issue when symbolizing tombstones.

tools/mb/mb.py

Index: tools/mb/mb.py
diff --git a/tools/mb/mb.py b/tools/mb/mb.py
index 7335448bd5a15ddcc913a338ae361637743284e6..4e0262ea57eec3be10b06a294648087f65d0d2bc 100755
--- a/tools/mb/mb.py
+++ b/tools/mb/mb.py
@@ -886,6 +886,17 @@ class MetaBuildWrapper(object):
       command, extra_files = self.GetIsolateCommand(target, vals)
 
       runtime_deps = self.ReadFile(runtime_deps_path).splitlines()
+      if android:
+        # TODO(hzl): Rewrite the following lib.unstripped logic.
+        # crbug.com/749283
+        unstripped_libs = []
+        for f in runtime_deps:
+          if f.endswith('.so'):
+            if os.path.isfile(self.PathJoin(self.ToAbsPath(build_dir),
+                                            'lib.unstripped',
+                                            os.path.basename(f))):
+              unstripped_libs.append('lib.unstripped/%s' % os.path.basename(f))
+        runtime_deps.extend(unstripped_libs)
 
       self.WriteIsolateFiles(build_dir, command, target, runtime_deps,
                              extra_files)