Disable global motion experiment when incompatible experiments are enabled

This is temporary until the global motion experiment is made to work
with ext_inter and dual_filter.

Change-Id: I73624ca6f536fd98218d7e07bcd7a2c1e6f5aebd

configure

@@ -434,6 +434,12 @@ post_process_cmdline() {
     for c in ${CODECS}; do
         enabled ${c} && enable_feature ${c##*_}s
     done
+
+    if enabled global_motion && (enabled ext_inter || enabled dual_filter); then
+      log_echo "global_motion currently not compatible with ext_inter"
+      log_echo "and dual_filter. Disabling global_motion."
+      disable_feature global_motion
+    fi
 }