Fix typos in doxygen

Author: peterschrammel

src/java_bytecode/java_object_factory.cpp

@@ -1512,7 +1512,7 @@ exprt object_factory(
   return object;
 }
 
-/// Initializes a primitive-typed or referece-typed object tree rooted at
+/// Initializes a primitive-typed or reference-typed object tree rooted at
 /// `expr`, allocating child objects as necessary and nondet-initializing their
 /// members, or if MAY_ or MUST_UPDATE_IN_PLACE is set, re-initializing
 /// already-allocated objects.

src/java_bytecode/java_types.cpp

@@ -256,7 +256,7 @@ std::string erase_type_arguments(const std::string &src)
 /// Returns the full class name, skipping over the generics.
 /// \param src: a type descriptor or signature
 ///   1. Signature:  Lcom/package/OuterClass<TT;>.Inner;
-///   2. Descriptor: Lcom.pacakge.OuterClass$Inner;
+///   2. Descriptor: Lcom.package.OuterClass$Inner;
 /// \return The full name of the class like com.package.OuterClass.Inner (for
 ///   both examples).
 std::string gather_full_class_name(const std::string &src)