arch/x86/kernel/.gitignore: Added vmlinux.lds to .gitignore file because it shouldn't be tracked.

Signed-off-by: Daniel Guilak <daniel@danielguilak.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/x86/kernel/.gitignore

@@ -1,2 +1,3 @@
 vsyscall.lds
 vsyscall_32.lds
+vmlinux.lds