pa-gas.h (DBX_DEBUGGING_INFO): Remove all #define and #undef statements related to debugging information.

        * pa/pa-gas.h (DBX_DEBUGGING_INFO): Remove all #define
        and #undef statements related to debugging information.
        * pa/pa-hpux.h, pa-hpux7.h: Likewise
        * pa/pa.c (override_options): Disable "-g" and issue a warning
        if it's used when !TARGET_GAS.

From-SVN: r12694