common/environment/build-style/python3-*.sh: add python3-packaging-bootstrap

...if verifying python dependencies. needed for python module dependency
verification hook

Author: classabbyamp

common/environment/build-style/python3-module.sh

@@ -1,3 +1,6 @@
 lib32disabled=yes
+if [ -z "$nopyprovides" ] || [ -z "$noverifypydeps" ]; then
+	hostmakedepends+=" python3-packaging-bootstrap"
+fi
 makedepends+=" python3"
 build_helper+=" python3"

common/environment/build-style/python3-pep517.sh

@@ -1,3 +1,6 @@
-hostmakedepends+=" python3-build python3-installer"
 lib32disabled=yes
+hostmakedepends+=" python3-build python3-installer"
+if [ -z "$nopyprovides" ] || [ -z "$noverifypydeps" ]; then
+	hostmakedepends+=" python3-packaging-bootstrap"
+fi
 build_helper+=" python3"