Add disabled_any() and disabled_all() functions.

Originally committed as revision 7741 to svn://svn.ffmpeg.org/ffmpeg/trunk

configure

@@ -235,12 +235,24 @@ enabled_all(){
     done
 }
 
+disabled_all(){
+    for opt; do
+        disabled $opt || return 1
+    done
+}
+
 enabled_any(){
     for opt; do
         enabled $opt && return 0
     done
 }
 
+disabled_any(){
+    for opt; do
+        disabled $opt && return 0
+    done
+}
+
 check_deps(){
     for cfg; do
         eval dep_all="\$${cfg}_deps"