[weak vtables] Remove a bunch of weak vtables

This patch removes most of the trivial cases of weak vtables by pinning them to
a single object file.

Differential Revision: http://llvm-reviews.chandlerc.com/D2068

Reviewed by Andy

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194865 91177308-0d34-0410-b5e6-96231b3b80d8

examples/ExceptionDemo/ExceptionDemo.cpp

@@ -1577,9 +1577,11 @@ public:
                                  std::runtime_error::operator=(toCopy)));
   }
 
-  ~OurCppRunException (void) throw () {}
+  ~OurCppRunException (void) throw ();
 };
 
+OurCppRunException::~OurCppRunException() throw () {}
+
 
 /// Throws foreign C++ exception.
 /// @param ignoreIt unused parameter that allows function to match implied