added patch for configure.ac in order to remove the check for colored build output. that one killed the prepare phase.

net-im/jabberd2/files/jabberd2-2.3.6-configure.patch

@@ -0,0 +1,15 @@
+diff --git a/configure.ac b/configure.ac
+index 4f52c86..d481583 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -80,10 +80,6 @@ if test "x-$want_mio_debug" = "x-yes" ; then
+     AC_DEFINE(MIO_DEBUG,1,[Define to 1 if you want to enable managed IO debug output.])
+ fi
+ 
+-# Colorized build output
+-AX_CHECK_COMPILE_FLAG([-fdiagnostics-color], [CFLAGS="${CFLAGS} -fdiagnostics-color"],
+-    [AX_CHECK_COMPILE_FLAG([-fcolor-diagnostics], [CFLAGS="${CFLAGS} -fcolor-diagnostics"])])
+-
+ # Two-step header checking.  First check for headers which don't
+ # require any other headers.
+ AC_HEADER_DIRENT