fix file specification in comments

Many files include the filename at the beginning, serveral used a wrong one.

Signed-off-by: Uwe Kleine-König <ukleinek@informatik.uni-freiburg.de>
Signed-off-by: Adrian Bunk <bunk@stusta.de>

arch/um/include/sysdep-i386/archsetjmp.h

@@ -1,5 +1,5 @@
 /*
- * arch/i386/include/klibc/archsetjmp.h
+ * arch/um/include/sysdep-i386/archsetjmp.h
  */
 
 #ifndef _KLIBC_ARCHSETJMP_H

arch/um/include/sysdep-x86_64/archsetjmp.h

@@ -1,5 +1,5 @@
 /*
- * arch/x86_64/include/klibc/archsetjmp.h
+ * arch/um/include/sysdep-x86_64/archsetjmp.h
  */
 
 #ifndef _KLIBC_ARCHSETJMP_H