[librsvg/darwin-check-2.50] configure: properly check for darwin host

[Ignacio Casal Quinteiro <icq src gnome org>]

commit 7102c68d26a3b098c2a3b4da574710ede0567567
Author: Ignacio Casal Quinteiro <qignacio amazon com>
Date:   Tue Dec 29 15:33:37 2020 +0100

    configure: properly check for darwin host

 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/configure.ac b/configure.ac
index fed5f9f6..c4479817 100644
--- a/configure.ac
+++ b/configure.ac
@@ -160,7 +160,7 @@ dnl ===========================================================================
 
 AC_MSG_CHECKING([for darwin])
 case "$host" in
-  darwin*)
+  *-*-darwin*)
     native_darwin=yes
     ;;
   *)