[gimp] build: update dev flatpak to 2.10.0 RC2.

[Jehan Pagès <jehanp src gnome org>]

commit 12b9d7a4e7789e1f1ab9c709a71a7ecc743acb15
Author: Jehan <jehan girinstud io>
Date:   Wed Apr 18 12:34:07 2018 +0200

    build: update dev flatpak to 2.10.0 RC2.

 build/flatpak/org.gimp.GIMP-dev.json |   12 ++++++------
 1 files changed, 6 insertions(+), 6 deletions(-)
---
diff --git a/build/flatpak/org.gimp.GIMP-dev.json b/build/flatpak/org.gimp.GIMP-dev.json
index 5092073..08f1c25 100644
--- a/build/flatpak/org.gimp.GIMP-dev.json
+++ b/build/flatpak/org.gimp.GIMP-dev.json
@@ -71,8 +71,8 @@
                 {
                     "type": "git",
                     "url": "git://git.gnome.org/babl",
-                    "branch": "BABL_0_1_44",
-                    "commit": "9e4bfe9f1470a7836f7f885ea95607427ed7997f"
+                    "branch": "BABL_0_1_46",
+                    "commit": "e92ced2c54250af1dddb58f76ff1678d74a30dcf"
                 }
             ]
         },
@@ -84,8 +84,8 @@
                 {
                     "type": "git",
                     "url": "git://git.gnome.org/gegl",
-                    "branch": "GEGL_0_3_30",
-                    "commit": "6183445f039847814ebf52edb77e861004aa93ab"
+                    "branch": "GEGL_0_3_34",
+                    "commit": "29254dcd875d271043aba57d0e6ebc48ec63c013"
                 }
             ]
         },
@@ -97,8 +97,8 @@
                 {
                     "type": "git",
                     "url": "git://git.gnome.org/gimp",
-                    "branch": "GIMP_2_10_0_RC1",
-                    "commit": "956ca8e3a39cc93d8fae439a8e5eb073059db011"
+                    "branch": "GIMP_2_10_0_RC2",
+                    "commit": "6582692ec6c8196108b2d42f6758c62076a88d13"
                 }
             ],
            "post-install": [