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/README b/README
index dc2103f..e1d58bd 100644
--- a/README
+++ b/README
@@ -185,7 +185,7 @@
 - arch/arm/lib	Files generic to ARM	 architecture
 - arch/avr32/lib	Files generic to AVR32	 architecture
 - arch/blackfin/lib	Files generic to Blackfin architecture
-- lib_generic	Files generic to all	 architectures
+- lib	Files generic to all	 architectures
 - arch/i386/lib	Files generic to i386	 architecture
 - arch/m68k/lib	Files generic to m68k	 architecture
 - arch/microblaze/lib Files generic to microblaze architecture