x32: Drop non-__vdso weak symbols from the x32 VDSO

Drop the legacy weak symbols that don't carry the __vdso prefix from
the x32 VDSO.  This is a new ABI and we don't need to support that
legacy; the actual libc will export the proper symbols.

Suggested-by: Andy Lutomirski <luto@mit.edu>
Link: http://lkml.kernel.org/r/4F42E171.9080005@mit.edu
Cc: H. J. Lu <hjl.tools@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
diff --git a/arch/x86/vdso/vdsox32.lds.S b/arch/x86/vdso/vdsox32.lds.S
index 373ca9a..62272aa 100644
--- a/arch/x86/vdso/vdsox32.lds.S
+++ b/arch/x86/vdso/vdsox32.lds.S
@@ -17,13 +17,9 @@
 VERSION {
 	LINUX_2.6 {
 	global:
-		clock_gettime;
 		__vdso_clock_gettime;
-		gettimeofday;
 		__vdso_gettimeofday;
-		getcpu;
 		__vdso_getcpu;
-		time;
 		__vdso_time;
 	local: *;
 	};