Record configure commandline.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1757 c046a42c-6fe2-441c-8c8c-71466251a162

configure

@@ -466,6 +466,7 @@ config_h="config-host.h"
 #echo "Creating $config_mak and $config_h"
 
 echo "# Automatically generated by configure - do not modify" > $config_mak
+echo "# Configured with: $0 $@" >> $config_mak
 echo "/* Automatically generated by configure - do not modify */" > $config_h
 
 echo "prefix=$prefix" >> $config_mak