Add a stub for _Unwind_RaiseException

Author: tomaka

src/library.js

@@ -4052,8 +4052,19 @@ LibraryManager.library = {
     return 0; // we cannot succeed
   },
 
+  _Unwind_RaiseException__deps: ['__cxa_find_matching_catch', '$EXCEPTIONS'],
   _Unwind_RaiseException: function(ex) {
-    abort('Unwind_RaiseException');
+    // TODO
+    Module.printErr('Warning: _Unwind_RaiseException is not correctly implemented');
+    EXCEPTIONS.infos[ex] = {
+      ptr: ex,
+      adjusted: ex,
+      type: null,
+      destructor: null,
+      refcount: 0
+    };
+    EXCEPTIONS.last = ex;
+    {{{ makeThrow('ex') }}}
   },
 
   _Unwind_DeleteException: function(ex) {