test-lfs runs for ever on ReiserFS. Let's disable it completely.

Index: glibc-2.15/io/Makefile
===================================================================
--- glibc-2.15.orig/io/Makefile
+++ glibc-2.15/io/Makefile
@@ -64,7 +64,7 @@ static-only-routines = stat fstat lstat
 
 others		:= pwd
 test-srcs	:= ftwtest
-tests		:= test-utime test-stat test-stat2 test-lfs tst-getcwd \
+tests		:= test-utime test-stat test-stat2 tst-getcwd \
 		   tst-fcntl bug-ftw1 bug-ftw2 bug-ftw3 bug-ftw4 tst-statvfs \
 		   tst-openat tst-unlinkat tst-fstatat tst-futimesat \
 		   tst-renameat tst-fchownat tst-fchmodat tst-faccessat \