Makefile: rename all libraries to built-in.o

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
diff --git a/board/davinci/da8xxevm/u-boot-spl-hawk.lds b/board/davinci/da8xxevm/u-boot-spl-hawk.lds
index e43130a..d49c314 100644
--- a/board/davinci/da8xxevm/u-boot-spl-hawk.lds
+++ b/board/davinci/da8xxevm/u-boot-spl-hawk.lds
@@ -19,8 +19,8 @@
 	.text      :
 	{
 	  arch/arm/cpu/arm926ejs/start.o		(.text*)
-	  arch/arm/cpu/arm926ejs/davinci/libdavinci.o	(.text*)
-	  drivers/mtd/nand/libnand.o			(.text*)
+	  arch/arm/cpu/arm926ejs/davinci/built-in.o	(.text*)
+	  drivers/mtd/nand/built-in.o			(.text*)
 
 	  *(.text*)
 	}