Zap bash construct.

Index: configure
--- configure.orig
+++ configure
@@ -25265,7 +25265,7 @@ else
 fi
 
 
-JAVAC=${JAVAC/ecj/ecj -1.5}
+#JAVAC=${JAVAC/ecj/ecj -1.5}
 
 if test -z "$JAVAH"; then :
   for ac_prog in javah
