Add progress messages for builder.conf values

To help debug issues related to SWUPD config values being set in the
chroot, or not, print out diagnostic messages to display the expected
values.

Signed-off-by: Patrick McCarty <patrick.mccarty@intel.com>

bundle-chroot-builder.py

@@ -302,15 +302,19 @@ def create_chroots(args, state_dir, bundles, yum_conf):
     versionurl = conf['VERSIONURL']
     formatname = conf['FORMAT']
 
+    print("Adding SWUPD default values to '{}' bundle...".format(bundlename))
     """Do not add a leading slash on anything except the first variable in os.path.join!"""
     confpath = os.path.join(out_dir, bundlename, "usr/share/defaults/swupd/")
     os.makedirs(confpath, exist_ok=True)
     with open(os.path.join(confpath, "contenturl"), "w") as file:
         file.writelines(contenturl)
+    print("  contenturl: {}".format(contenturl))
     with open(os.path.join(confpath, "versionurl"), "w") as file:
         file.writelines(versionurl)
+    print("  versionurl: {}".format(versionurl))
     with open(os.path.join(confpath, "format"), "w") as file:
         file.writelines(formatname)
+    print("  format: {}".format(formatname))
 
     print("Creating package to file mappings")
     package_mapping = {}