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/hermes/u-boot.lds b/board/hermes/u-boot.lds
index 1252baf..1f6e7d6 100644
--- a/board/hermes/u-boot.lds
+++ b/board/hermes/u-boot.lds
@@ -61,7 +61,7 @@
     arch/ppc/lib/time.o		(.text)
     arch/ppc/lib/ticks.o		(.text)
     arch/ppc/lib/cache.o		(.text)
-    lib_generic/crc32.o		(.text)
+    lib/crc32.o		(.text)
     . = env_offset;
     common/env_embedded.o(.text)