dtc: Update the build rule for pylibfdt
Some versions of make complain about using a grouped target without a
recipe:
.../pylibfdt/Makefile:36: *** grouped targets must provide a recipe. Stop.
Fix this by adding a dummy recipe.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/scripts/dtc/pylibfdt/Makefile b/scripts/dtc/pylibfdt/Makefile
index 4782dd4..493995e 100644
--- a/scripts/dtc/pylibfdt/Makefile
+++ b/scripts/dtc/pylibfdt/Makefile
@@ -34,6 +34,7 @@
fi
$(obj)/_libfdt.so $(obj)/libfdt.py &: rebuild
+ @:
always += _libfdt.so libfdt.py