[C++ification] Glue and utilities code changes

  * Use `new/delete/delete[]` more
  * Avoid calling the `printf` family of functions in favor of new, template,
    `string_concat` in the `Utils` class. When `sprintf` is used to concatenate
    just strings we can do better by not calling the C varargs functions and
    generate very efficient code.
  * Replace C `strdup` calls with our, based on `new`, strdup implementation

Author: grendello

src/monodroid/jni/embedded-assemblies.cc

@@ -53,7 +53,7 @@ void EmbeddedAssemblies::set_assemblies_prefix (const char *prefix)
 {
 	if (assemblies_prefix_override != nullptr)
 		delete[] assemblies_prefix_override;
-	assemblies_prefix_override = prefix != nullptr ? strdup (prefix) : nullptr;
+	assemblies_prefix_override = prefix != nullptr ? utils.strdup_new (prefix) : nullptr;
 }
 
 MonoAssembly*

src/monodroid/jni/embedded-assemblies.h

@@ -83,5 +83,4 @@ namespace xamarin { namespace android { namespace internal {
 }}}
 
 MONO_API int monodroid_embedded_assemblies_set_assemblies_prefix (const char *prefix);
-
 #endif /* INC_MONODROID_EMBEDDED_ASSEMBLIES_H */