* libU77/sys_clock_.c: File renamed from system_clock_.c.
        libU77/Makefile.in, Makefile.in : Reference sys_clock_.*, not
        system_clock_.*.
        * libU77/dtime_.c (clk_tck): Try also HZ macro.
        * libU77/access.c (G77_access_0): Check malloc return value against 0,
        not NULL.
        libU77/getlog_.c, libU77/ttynam_.c, libU77/chdir_.c: Ditto.
        libU77/chmod_.c, libU77/rename_.c: Ditto.

From-SVN: r15821