[gnome-photos] build: Make the Git submodules work with Web proxies

[Debarshi Ray <debarshir src gnome org>]

commit cdc744da7b3e6d514c925508f7534ef815c4625f
Author: Saksham Bhalla <saksham bhalla5 gmail com>
Date:   Mon Oct 16 17:19:13 2017 +0530

    build: Make the Git submodules work with Web proxies
    
    https://bugzilla.gnome.org/show_bug.cgi?id=789002

 .gitmodules |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/.gitmodules b/.gitmodules
index bfd964e..7f7d37c 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,3 @@
 [submodule "libgd"]
        path = libgd
-       url = git://git.gnome.org/libgd
+       url = https://git.gnome.org/browse/libgd