[PATCH] Enable VDSO for static linking on m68k.

[Rafael Avila de Espindola]

The attached patch enables VDSO for static linking on m68k.

I am doing this mostly for completeness. Once every architectures
supports this we can simplify the #ifdefs.

Cheers,
Rafael

2019-01-28  Rafael Ávila de Espíndola  <rafael@espindo.la>

	[BZ #19767]
        * sysdeps/unix/sysv/linux/m68k/init-first.c: Remove #ifdef SHARED.
        * sysdeps/unix/sysv/linux/m68k/m68k-vdso.c: Remove #ifdef SHARED.
        * sysdeps/unix/sysv/linux/m68k/m68k-vdso.h: Remove #ifdef SHARED.
        * sysdeps/unix/sysv/linux/m68k/sysdep.h: Define ALWAYS_USE_VSYSCALL.