Corrected location of compiler.namespaces.namespace location in argument...

Hey,

mxmlc compiler seems to have a problem when namespaces.namespace arguments are at the end of the list. It will not recognize the end of list and location of source file, thus following error will be thrown:

command line: Error: ambiguous argument list; unable to determine where 'compiler.namespaces.namespace' parameters end, and default 'file-specs' parameters begin.  Use '--' to terminate the parameter list, or perhaps use the '-compiler.namespaces.namespace=val[,val]+' syntax instead.

My fix will set the namespaces.namespace arguments to the beginning of the list.