Makefile: rename all libraries to built-in.o

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
diff --git a/board/vpac270/u-boot-spl.lds b/board/vpac270/u-boot-spl.lds
index 7eac497..c9b50e9 100644
--- a/board/vpac270/u-boot-spl.lds
+++ b/board/vpac270/u-boot-spl.lds
@@ -20,8 +20,8 @@
 	.text.0	:
 	{
 		arch/arm/cpu/pxa/start.o		(.text*)
-		board/vpac270/libvpac270.o		(.text*)
-		drivers/mtd/onenand/libonenand.o	(.text*)
+		board/vpac270/built-in.o		(.text*)
+		drivers/mtd/onenand/built-in.o		(.text*)
 	}