Bug#913051: hsqldb1.8.0 FTBFS with OpenJDK 11

[Adrian Bunk <bunk@debian.org>]

Source: hsqldb1.8.0
Version: 1.8.0.10+dfsg-9
Severity: serious
Tags: ftbfs

https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/hsqldb1.8.0.html

...
lib:
    [javac] /build/1st/hsqldb1.8.0-1.8.0.10+dfsg/build/build.xml:351: warning: 'includeantruntime' was not set, defaulting to build.sysclasspath=last; set to false for repeatable builds
    [javac] Compiling 40 source files to /build/1st/hsqldb1.8.0-1.8.0.10+dfsg/classes
    [javac] Using ant.build.javac.target 1.5 is no longer supported, switching to 6
    [javac] Using ant.build.javac.target 1.5 is no longer supported, switching to 6
    [javac] Using ant.build.javac.source 1.5 is no longer supported, switching to 6
    [javac] warning: [options] bootstrap class path not set in conjunction with -source 6
    [javac] warning: [options] source value 6 is obsolete and will be removed in a future release
    [javac] warning: [options] target value 1.6 is obsolete and will be removed in a future release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/hsqldb1.8.0-1.8.0.10+dfsg/src/org/hsqldb/lib/java/JavaSystem.java:163: error: cannot find symbol
    [javac]         System.runFinalizersOnExit(true);
    [javac]               ^
    [javac]   symbol:   method runFinalizersOnExit(boolean)
    [javac]   location: class System
    [javac] Note: Some input files use or override a deprecated API.
    [javac] Note: Recompile with -Xlint:deprecation for details.
    [javac] Note: Some input files use unchecked or unsafe operations.
    [javac] Note: Recompile with -Xlint:unchecked for details.
    [javac] 1 error
    [javac] 4 warnings