* gdb.hp/gdb.base-hp/so-thresh.exp: Update text in expect strings

    * gdb.hp/gdb.base-hp/so-thresh.exp: Update text in expect strings
        to match current gdb output.  Update due to using auto-solib-limit
        for limiting instead of overloading auto-solib-add.
        * gdb.hp/gdb.base-hp/so-thresh.mk: Always use "cc" to build the
        test program.

        * gdb.c++/templates.exp: Use "hppa64-*-*", not "hppa2.0w-*-*"
        * gdb.hp/gdb.base-hp/dollar.exp: Likewise
        * gdb.hp/gdb.base-hp/pxdb.exp: Likewise.
        * gdb.hp/gdb.base-hp/reg-pa64.exp: Likewise.
        * gdb.hp/gdb.base-hp/reg.exp: Likewise.
        * gdb.hp/gdb.compat/xdb3.exp: Likewise.
        * gdb.hp/gdb.defects/bs15503.exp: Likewise.
        * gdb.hp/gdb.objdbg/objdbg01.exp: Likewise
        * gdb.hp/gdb.objdbg/objdbg02.exp: Likewise
        * gdb.hp/gdb.objdbg/objdbg03.exp: Likewise
        * gdb.hp/gdb.threads-hp/usrthbasic.exp: Likewise.
        * gdb.hp/gdb.threads-hp/usrthcore.exp: Likewise.
        * gdb.hp/gdb.threads-hp/usrthfork.exp: Likewise.