build: Fix cld sources exclusion.
build: Fix cld sources exclusion.

As of commit 107e5229141879b69225153dc9e6d15f54c8c7bf, @paulcbetts/cld
was renamed to cld.

docs is not being included anyway since it’s outside of app.

Signed-off-by: Anders Kaseorg <dfdb7392591db597bc41cf266a9c3bc12a2706e5@zulipchat.com>

zulip/zulip-desktop,zulip/zulip-desktop,zulip/zulip-desktop,zulip/zulip-desktop