[U-Boot] [PATCH] travis: Fix the clang-7 test

[Tom Rini]

When using the OVERRIDE variable we need to pass -O to buildman as well
to use the "override" option to buildman.

Fixed: e9500f49ea35 ("travis: Use buildman for building with clang")
Signed-off-by: Tom Rini <trini at konsulko.com>
---
 .travis.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.travis.yml b/.travis.yml
index a3e7451bcb17..97b41fc01258 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -389,7 +389,7 @@ matrix:
       env:
         - TEST_PY_BD="sandbox"
           BUILDMAN="^sandbox$"
-          OVERRIDE="clang-7"
+          OVERRIDE="-O clang-7"
     - name: "test/py sandbox_spl"
       env:
         - TEST_PY_BD="sandbox_spl"
-- 
2.17.1