efi: sandbox: Add required linker sections

The EFI loader code requires certain linker sections to exist. Add these
for sandbox so that the EFI loader code will link.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
diff --git a/arch/sandbox/lib/sections.c b/arch/sandbox/lib/sections.c
new file mode 100644
index 0000000..697a816
--- /dev/null
+++ b/arch/sandbox/lib/sections.c
@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2013 Albert ARIBAUD <albert.u.boot@aribaud.net>
+ *
+ */
+
+char __efi_runtime_start[0] __attribute__((section(".__efi_runtime_start")));
+char __efi_runtime_stop[0] __attribute__((section(".__efi_runtime_stop")));
+char __efi_runtime_rel_start[0]
+		__attribute__((section(".__efi_runtime_rel_start")));
+char __efi_runtime_rel_stop[0]
+		__attribute__((section(".__efi_runtime_rel_stop")));