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/Makefile b/Makefile
index de8a4cd..0b70dca 100644
--- a/Makefile
+++ b/Makefile
@@ -183,9 +183,9 @@
 
 OBJS := $(addprefix $(obj),$(OBJS))
 
-LIBS  = lib_generic/libgeneric.a
-LIBS += lib_generic/lzma/liblzma.a
-LIBS += lib_generic/lzo/liblzo.a
+LIBS  = lib/libgeneric.a
+LIBS += lib/lzma/liblzma.a
+LIBS += lib/lzo/liblzo.a
 LIBS += $(shell if [ -f board/$(VENDOR)/common/Makefile ]; then echo \
 	"board/$(VENDOR)/common/lib$(VENDOR).a"; fi)
 LIBS += $(CPUDIR)/lib$(CPU).a