um: get rid of pointless include "..." where include <...> will do

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
diff --git a/arch/um/include/shared/arch.h b/arch/um/include/shared/arch.h
index 2de92a0..4f46abd 100644
--- a/arch/um/include/shared/arch.h
+++ b/arch/um/include/shared/arch.h
@@ -6,7 +6,7 @@
 #ifndef __ARCH_H__
 #define __ARCH_H__
 
-#include "sysdep/ptrace.h"
+#include <sysdep/ptrace.h>
 
 extern void arch_check_bugs(void);
 extern int arch_fixup(unsigned long address, struct uml_pt_regs *regs);