r_found_version structure as second parameter.
* sysdeps/unix/sysv/linux/dl-vdso.h (PREPARE_VERSION): Define.
(_dl_vdso_vsym): Change type of second parameter accordingly.
* sysdeps/unix/sysv/linux/x86-64/libc-start.c
(_libc_vdso_platform_setup): Adjust.
* sysdeps/unix/sysv/linux/pwoerpc/libc-start.c
(_libc_vdso_platform_setup): Likewise.