vdso.lds in arch/x86_64/vdso/.gitignore

From: Pete Zaitcev <zaitcev@redhat.com>
Create arch/x86_64/vdso/.gitignore and put vdso.lds into it.

Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Andi Kleen <ak@suse.de>

---

Utterly trivial but for some reason missing. V.odd. I must be
misunderstanding how this works, but just in case here's patch.

---
 arch/x86_64/vdso/.gitignore |    1 +
 1 file changed, 1 insertion(+)

Index: linux/arch/x86_64/vdso/.gitignore
===================================================================
--- /dev/null
+++ linux/arch/x86_64/vdso/.gitignore
@@ -0,0 +1 @@
+vdso.lds