fix pointer style to match the style guide

We do this in a lot of places, but we're inconsistent.
Normalize the code to the Google C++ style guide.

Change-Id: Ic2aceab661ce8f6b993dda21b1cdf5d2198dcbbf
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/2262932
Reviewed-by: Sterling Augustine <saugustine@google.com>
Reviewed-by: Mark Mentovai <mark@chromium.org>

src/processor/module_comparer.h

@@ -64,7 +64,7 @@ class ModuleComparer {
   // FastSourceLineResolver loads its module using the serialized memory chunk,
   // Then, traverse both modules together and compare underlying data
   // return true if both modules contain exactly same data.
-  bool Compare(const string &symbol_data);
+  bool Compare(const string& symbol_data);
 
  private:
   typedef BasicSourceLineResolver::Module BasicModule;