tools: Keep test_util and patman test files in the pip release

The test_util module is actually imported by some tools, e.g. binman so
include it in the pip release.

The patman tool uses its test code when starting up, so keep that too.

Show a list of deleted files so it is clear what is happening.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/scripts/make_pip.sh b/scripts/make_pip.sh
index 4602dcf..25a4049 100755
--- a/scripts/make_pip.sh
+++ b/scripts/make_pip.sh
@@ -29,6 +29,9 @@
 # Non-empty to do the actual upload
 upload=1
 
+# Non-empty to delete files used for testing
+delete_testfiles=1
+
 tool="$1"
 shift
 flags="$*"
@@ -58,6 +61,11 @@
 	fi
 fi
 
+if [[ "${tool}" =~ ^(patman|u_boot_pylib)$ ]]; then
+	# Leave test_util.py and patman test files alone
+	delete_testfiles=
+fi
+
 # Create a temp dir to work in
 dir=$(mktemp -d)
 
@@ -91,7 +99,9 @@
 find ${dest} -depth -name __pycache__ -exec rmdir 112 \;
 
 # Remove test files
-rm -rf ${dest}/*test*
+if [ -n "${delete_testfiles}" ]; then
+	rm -rfv ${dest}/*test*
+fi
 
 mkdir ${dir}/tests
 cd ${dir}