java: Clean up parse_method_descriptor()
java: Clean up parse_method_descriptor()

Use vector::emplace_back() like normal people do...

Signed-off-by: Pekka Enberg <add4fcd06328a394f0ad91feda7ee057316dc5ed@iki.fi>

penberg/hornet,penberg/hornet,penberg/hornet,penberg/hornet