CI, pytest: Add a test for sandbox without LTO

The primary motivation for having a sandbox without LTO build in CI is
to ensure that we don't have that option break. We now have the ability
to run tests of specific options being enabled/disabled, so drop the
parts of CI that build and test that configuration specifically and add
a build test instead. We still test that "NO_LTO=1" rather than editing
the config file works via the ftrace tests.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/test/py/tests/test_sandbox_opts.py b/test/py/tests/test_sandbox_opts.py
index 91790b3..422b43c 100644
--- a/test/py/tests/test_sandbox_opts.py
+++ b/test/py/tests/test_sandbox_opts.py
@@ -18,3 +18,13 @@
     out = util.run_and_log(
         cons, ['./tools/buildman/buildman', '-m', '--board', 'sandbox',
                '-a', '~CMDLINE', '-o', TMPDIR])
+
+@pytest.mark.slow
+@pytest.mark.boardspec('sandbox')
+def test_sandbox_lto(u_boot_console):
+    """Test building sandbox without CONFIG_LTO"""
+    cons = u_boot_console
+
+    out = util.run_and_log(
+        cons, ['./tools/buildman/buildman', '-m', '--board', 'sandbox',
+               '-a', '~LTO', '-o', TMPDIR])