Bug#893158: httpunit FTBFS with openjdk-9

[Adrian Bunk]

Source: httpunit
Version: 1.7+dfsg-12
Severity: serious
Tags: buster sid

https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/httpunit.html

...
compile:
    [mkdir] Created dir: /build/1st/httpunit-1.7+dfsg/build/classes
    [javac] /build/1st/httpunit-1.7+dfsg/build.xml:136: warning: 'includeantruntime' was not set, defaulting to build.sysclasspath=last; set to false for repeatable builds
    [javac] Compiling 195 source files to /build/1st/httpunit-1.7+dfsg/build/classes
    [javac] Using ant.build.javac.target 1.5 is no longer supported, switching to 1.6
    [javac] Using ant.build.javac.target 1.5 is no longer supported, switching to 1.6
    [javac] Using ant.build.javac.source 1.5 is no longer supported, switching to 1.6
    [javac] warning: [options] bootstrap class path not set in conjunction with -source 1.6
    [javac] warning: [options] source value 1.6 is obsolete and will be removed in a future release
    [javac] warning: [options] target value 1.6 is obsolete and will be removed in a future release
    [javac] warning: [options] To suppress warnings about obsolete options, use -Xlint:-options.
    [javac] /build/1st/httpunit-1.7+dfsg/src/com/meterware/httpunit/HttpWebResponse.java:92: error: unmappable character (0xF6) for encoding US-ASCII
    [javac]     			// by Roger Lindsj?
    [javac]     			                  ^
    [javac] /build/1st/httpunit-1.7+dfsg/src/com/meterware/servletunit/ServletUnitServletContext.java:127: error: unmappable character (0xE4) for encoding US-ASCII
    [javac]             // by Timo Westk?mper
    [javac]                             ^
    [javac] 2 errors
    [javac] 4 warnings

BUILD FAILED
/build/1st/httpunit-1.7+dfsg/build.xml:136: Compile failed; see the compiler error output for details.

Total time: 2 seconds
make[1]: *** [debian/rules:14: override_dh_auto_build] Error 1