Make find_runtime_tools available for non-Chrome executables.

tools/find_runtime_symbols/prepare_symbol_info.py

Index: tools/find_runtime_symbols/prepare_symbol_info.py
diff --git a/tools/find_runtime_symbols/prepare_symbol_info.py b/tools/find_runtime_symbols/prepare_symbol_info.py
index 9bce5455c825f9c6aa48d3561e75912434141202..17d34deaa22b0fca032125ffec44c0e0fd12872d 100755
--- a/tools/find_runtime_symbols/prepare_symbol_info.py
+++ b/tools/find_runtime_symbols/prepare_symbol_info.py
@@ -154,6 +154,9 @@ def prepare_symbol_info(maps_path,
     for target_path, host_path in alternative_dirs.iteritems():
       if entry.name.startswith(target_path):
         binary_path = entry.name.replace(target_path, host_path, 1)
+    if not (ProcMaps.EXECUTABLE_PATTERN.match(binary_path) or
+            (os.path.isfile(binary_path) and os.access(binary_path, os.X_OK))):
+      continue
     nm_filename = _dump_command_result(
         'nm -n --format bsd %s | c++filt' % binary_path,
         output_dir_path, os.path.basename(binary_path), '.nm')