Bug#866845: libidw-java FTBFS: PropertyMapImpl.java:383: error: unmappable character for encoding ASCII

[Emmanuel Bourg]

Control: reassign -1 javahelper 0.60
Control: affects -1 libidw-java

Thank you Adrian. This issue was introduced by javahelper 0.60 that now
uses the source/target level 1.7 by default. At this level the compiler
becomes picky about the character encoding. javahelper must be modified
to also specify a default encoding. ISO-8859-1 should be a good choice
because any one byte character is considered valid.

Emmanuel Bourg