test: test/bloblist.c depends on asm/state.h

Building test/bloblist.c fails for non sandbox devices:

test/bloblist.c:10:10: fatal error: asm/state.h: No such file or directory
 #include <asm/state.h>
          ^~~~~~~~~~~~~

Build the test only on the sandbox.
Signed-off-by: NHeinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: NSimon Glass <sjg@chromium.org>

test/Makefile

@@ -2,7 +2,9 @@
 #
 # (C) Copyright 2012 The Chromium Authors
 
+ifneq ($(CONFIG_SANDBOX),)
 obj-$(CONFIG_$(SPL_)CMDLINE) += bloblist.o
+endif
 obj-$(CONFIG_$(SPL_)CMDLINE) += cmd/
 obj-$(CONFIG_$(SPL_)CMDLINE) += cmd_ut.o
 obj-$(CONFIG_$(SPL_)CMDLINE) += command_ut.o