Rename lib_generic/ to lib/

Now that the other architecture-specific lib directories have been
moved out of the top-level directory there's not much reason to have the
'_generic' suffix on the common lib directory.

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>

board/westel/amx860/u-boot.lds.debug

diff --git a/board/westel/amx860/u-boot.lds.debug b/board/westel/amx860/u-boot.lds.debug
index 919eb21..282738b 100644
--- a/board/westel/amx860/u-boot.lds.debug
+++ b/board/westel/amx860/u-boot.lds.debug
@@ -57,8 +57,8 @@
 
     cpu/mpc8xx/start.o	(.text)
     common/dlmalloc.o	(.text)
-    lib_generic/vsprintf.o	(.text)
-    lib_generic/crc32.o		(.text)
+    lib/vsprintf.o	(.text)
+    lib/crc32.o		(.text)
     arch/ppc/lib/extable.o	(.text)
 
     . = env_offset;