[gimp] configure.ac: release 2.10.0-RC2

[Michael Natterer <mitch src gnome org>]

commit 6582692ec6c8196108b2d42f6758c62076a88d13
Author: Michael Natterer <mitch gimp org>
Date:   Tue Apr 17 21:27:05 2018 +0200

    configure.ac: release 2.10.0-RC2

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 34364aa..c9f195a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -20,7 +20,7 @@ m4_define([gimp_binary_age],
           [m4_eval(100 * gimp_minor_version + gimp_micro_version)])
 
 # For overriding the version string. Comment out if not needed.
-m4_define([gimp_version], [2.10.0-RC1-git])
+m4_define([gimp_version], [2.10.0-RC2])
 
 # This is the X.Y used in -lgimp-X.Y
 m4_define([gimp_api_version], [2.0])