patman: Add support for building a patman PyPi package

Create the necessary files to build this new package.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/Makefile b/Makefile
index 21d606b..21e58ca 100644
--- a/Makefile
+++ b/Makefile
@@ -2282,6 +2282,7 @@
 
 _pip:
 	scripts/make_pip.sh u_boot_pylib ${PIP_ARGS}
+	scripts/make_pip.sh patman ${PIP_ARGS}
 
 help:
 	@echo  'Cleaning targets:'