JNAerator: dropped support for bit fields in JNA(erator) runtime (Pointer and Structure forks incurred far too much maintenance work at each new release of JNA!)
JNAerator: ditched all DLL and Mach-O symbols extraction code (not tested since years, largely superseded by dyncall/dynload for symbol enumeration and BridJ's demanglers for symbols parsing).
JNAerator: fixed BridJ version of bit fields test