Include the entire test suite in source distribution (#451)

By default, only files matching the test/test*.py pattern are included
in source distribution. This leaves the test suite unusable, because
resources and some necessary scripts are missing.
Fix that.

Signed-off-by: Nikola Forró <[email protected]>
Co-authored-by: Dmitriy Musatkin <[email protected]>

Author: nforro

MANIFEST.in

@@ -32,3 +32,5 @@ prune crt/aws-lc/tool
 prune crt/aws-lc/util
 include crt/aws-lc/util/fipstools/CMakeLists.txt
 include crt/aws-lc/util/fipstools/acvp/modulewrapper/CMakeLists.txt
+# by default only test/test*.py are included, include the entire test suite
+graft test