[pitivi] flatpak: Include hotdoc in the dev env

[Alexandru Băluț <alexbalut src gnome org>]

commit a310ff381ae0581bb85e8a693acfbdbc01f2cbc2
Author: Alexandru Băluț <alexandru balut gmail com>
Date:   Fri Dec 22 15:35:22 2017 +0100

    flatpak: Include hotdoc in the dev env
    
    Differential Revision: https://phabricator.freedesktop.org/D1926

 build/flatpak/pitivi-flatpak |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/build/flatpak/pitivi-flatpak b/build/flatpak/pitivi-flatpak
index 91df106..48c9333 100755
--- a/build/flatpak/pitivi-flatpak
+++ b/build/flatpak/pitivi-flatpak
@@ -545,7 +545,7 @@ class PitiviFlatpak:  # pylint: disable=too-many-instance-attributes
 
         venv_path = os.path.join(self.scriptdir, "pyvenv")
         activate_script = os.path.join(venv_path, "bin", "activate")
-        pip_modules = "git-phab pre-commit git-pylint-commit-hook git_pep8_commit_hook pylint"
+        pip_modules = "git-phab pre-commit git-pylint-commit-hook git_pep8_commit_hook pylint hotdoc"
         if not os.path.isdir(venv_path):
             print("Setting up a Python virtual env for development: %s" % venv_path)
             venv.create(venv_path, with_pip=True)