Add ruby 2.5 and 2.4 detection

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>

amarok/configure.in.in

@@ -1120,7 +1120,7 @@ if test -n "$PKG_CONFIG"; then
     RUBY_CFLAGS=`$PKG_CONFIG ruby --cflags`
   fi
   if test -z "$RUBY_VERSION"; then
-    for RUBY_TEST in 2.3 2.2 2.1 2.0 1.9; do
+    for RUBY_TEST in 2.5 2.4 2.3 2.2 2.1 2.0 1.9; do
       RUBY_VERSION=`$PKG_CONFIG ruby-$RUBY_TEST --modversion 2>/dev/null`
       if test -n "$RUBY_VERSION"; then
         RUBY_CFLAGS=`$PKG_CONFIG ruby-$RUBY_TEST --cflags`