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>
diff --git a/board/trab/u-boot.lds b/board/trab/u-boot.lds
index c3d5c49..05b929f 100644
--- a/board/trab/u-boot.lds
+++ b/board/trab/u-boot.lds
@@ -33,9 +33,9 @@
 	.text      :
 	{
 	  cpu/arm920t/start.o	(.text)
-	  lib_generic/zlib.o	(.text)
-	  lib_generic/crc32.o	(.text)
-	  lib_generic/string.o	(.text)
+	  lib/zlib.o	(.text)
+	  lib/crc32.o	(.text)
+	  lib/string.o	(.text)
 
 	. = DEFINED(env_offset) ? env_offset : .;
 	  common/env_embedded.o	(.ppcenv)