Move buildroot to bsp directory.

bsp/buildroot/board/intel/galileo/genimage.cfg

@@ -0,0 +1,31 @@
+# Create an image of the efi partition
+image efi-part.vfat {
+	vfat {
+		file startup.nsh {
+			image = "efi-part/startup.nsh"
+		}
+		file EFI {
+			image = "efi-part/EFI"
+		}
+	}
+	size=512K
+}
+
+# Create the sdcard image, pulling in
+#  * the image created by buildroot
+#  * the efi-partition created above
+image sdcard.img {
+	hdimage {
+	}
+
+	partition boot {
+		partition-type = 0xC
+		image = "efi-part.vfat"
+	}
+
+	partition rootfs {
+		partition-type = 0x83
+		image = "rootfs.ext2"
+		size = 512M
+	}
+}