Bug#893299: maven-ant-helper FTBFS with openjdk-9

[Adrian Bunk]

Source: maven-ant-helper
Version: 8.2
Severity: serious

https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/maven-ant-helper.html

...
compile:
    [mkdir] Created dir: /build/1st/maven-ant-helper-8.2/build/classes
    [mkdir] Created dir: /build/1st/maven-ant-helper-8.2/build/generated-sources
    [javac] /build/1st/maven-ant-helper-8.2/debian/build.xml:50: warning: 'includeantruntime' was not set, defaulting to build.sysclasspath=last; set to false for repeatable builds
    [javac] Using javac -source 1.4 is no longer supported, switching to 1.6
    [javac] Using javac -target 1.4 is no longer supported, switching to 1.6
    [javac] Compiling 1 source file to /build/1st/maven-ant-helper-8.2/build/classes
    [javac] /build/1st/maven-ant-helper-8.2/src/main/java/ModelloTask.java:8: error: unmappable character (0xC3) for encoding US-ASCII
    [javac]  * Copyright (C) 2007, Trygve Laugst??l
    [javac]                                     ^
    [javac] /build/1st/maven-ant-helper-8.2/src/main/java/ModelloTask.java:8: error: unmappable character (0xB8) for encoding US-ASCII
    [javac]  * Copyright (C) 2007, Trygve Laugst??l
    [javac]                                      ^
    [javac] 2 errors

BUILD FAILED
/build/1st/maven-ant-helper-8.2/debian/build.xml:50: Compile failed; see the compiler error output for details.

Total time: 1 second
dh_auto_build: ant -Duser.name debian -f debian/build.xml -DartifactId=maven-ant-helper -Dpackage=maven-ant-helper -Dversion=8.2 -propertyfile debian/build.properties package returned exit code 1
make[1]: *** [debian/rules:9: override_dh_auto_build] Error 2