delete gwt*.jar files from clean target
delete gwt*.jar files from clean target

Having the wrong versions of gwt*.jar seems to cause
gwtc to fail mysteriously.

jspacco/CloudCoder2,jspacco/CloudCoder2,wicky-info/CloudCoder,vjpudelski/CloudCoder,wicky-info/CloudCoder,wicky-info/CloudCoder,vjpudelski/CloudCoder,daveho/CloudCoder,cloudcoderdotorg/CloudCoder,x77686d/CloudCoder,jspacco/CloudCoder,vjpudelski/CloudCoder,daveho/CloudCoder,x77686d/CloudCoder,jspacco/CloudCoder2,vjpudelski/CloudCoder,wicky-info/CloudCoder,daveho/CloudCoder,wicky-info/CloudCoder,jspacco/CloudCoder,cloudcoderdotorg/CloudCoder,jspacco/CloudCoder,cloudcoderdotorg/CloudCoder,vjpudelski/CloudCoder,daveho/CloudCoder,csirkeee/CloudCoder,jspacco/CloudCoder2,cloudcoderdotorg/CloudCoder,jspacco/CloudCoder,jspacco/CloudCoder,jspacco/CloudCoder2,wicky-info/CloudCoder,csirkeee/CloudCoder,vjpudelski/CloudCoder,x77686d/CloudCoder,x77686d/CloudCoder,x77686d/CloudCoder,x77686d/CloudCoder,jspacco/CloudCoder2,wicky-info/CloudCoder,csirkeee/CloudCoder,jspacco/CloudCoder2,daveho/CloudCoder,jspacco/CloudCoder,cloudcoderdotorg/CloudCoder,jspacco/CloudCoder,csirkeee/CloudCoder,csirkeee/CloudCoder,daveho/CloudCoder,csirkeee/CloudCoder,cloudcoderdotorg/CloudCoder,cloudcoderdotorg/CloudCoder,x77686d/CloudCoder,csirkeee/CloudCoder,daveho/CloudCoder,vjpudelski/CloudCoder