[gnome-photos/gnome-3-26] flatpak: Update LibRaw to 0.18.8

[Debarshi Ray <debarshir src gnome org>]

commit cea022fd9524b109dc6986e74989428c85a05121
Author: Debarshi Ray <debarshir gnome org>
Date:   Mon Mar 12 16:36:04 2018 +0100

    flatpak: Update LibRaw to 0.18.8

 flatpak/org.gnome.Photos.json | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/flatpak/org.gnome.Photos.json b/flatpak/org.gnome.Photos.json
index 2a0ac7f9..93dd8e07 100644
--- a/flatpak/org.gnome.Photos.json
+++ b/flatpak/org.gnome.Photos.json
@@ -136,8 +136,8 @@
             "sources": [
                 {
                     "type": "archive",
-                    "url": "https://www.libraw.org/data/LibRaw-0.18.6.tar.gz";,
-                    "sha256": "e5b8acca558aa457bc9214802004320c5610d1434c2adb1f3ea367f026afa53b"
+                    "url": "https://www.libraw.org/data/LibRaw-0.18.8.tar.gz";,
+                    "sha256": "56aca4fd97038923d57d2d17d90aa11d827f1f3d3f1d97e9f5a0d52ff87420e2"
                 },
                 {
                     "type": "patch",