[gimp] devel-docs: adding new splash requirements.

[Jehan Pagès <jehanp src gnome org>]

commit 923ffb7e530a079241ec36bd72e5d5c93cee6190
Author: Jehan <jehan girinstud io>
Date:   Sun Mar 25 18:19:24 2018 +0200

    devel-docs: adding new splash requirements.
    
    Current splash is not right within these requirements. But that's all
    right for this RC.
    These requirements are meant to be followed from next release.

 devel-docs/release-howto.txt |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)
---
diff --git a/devel-docs/release-howto.txt b/devel-docs/release-howto.txt
index dc89896..625bf26 100644
--- a/devel-docs/release-howto.txt
+++ b/devel-docs/release-howto.txt
@@ -52,6 +52,16 @@
 
  ( ) Does the splash screen need to be changed?
 
+     Splash requirements:
+
+     [ ] Accepted license: a libre license, such as CC 0, CC by, CC
+         by-sa or Free Art.
+     [ ] XCF file must be provided.
+     [ ] Minimum size: full HD (splash images will be scaled down to 2/3
+         of the main display when too bug; but they won't be scaled up.
+         Therefore anything smaller than fullHD will look tiny and
+         unsuited on a 4K or higher res display).
+
  ( ) Bump the version number to an even micro in configure.ac and
      commit this change. It should be the version number of the
      release you are about to make. Releases always have even micro