Add missing ABI versions which are referenced in
glibc-rh677316-resolv.patch, to suppress -Wundef warnings.
(Not needed upstream because it does not use future ABI versions.)

diff --git a/Versions.def b/Versions.def
index 41a0d84bcf29a780..725f5d827ba3ec94 100644
--- a/Versions.def
+++ b/Versions.def
@@ -109,6 +109,8 @@ libresolv {
   GLIBC_2.2
   GLIBC_2.3.2
   GLIBC_2.9
+  GLIBC_2.25
+  GLIBC_2.26
   GLIBC_PRIVATE
 }
 librt {