Upgrade bundled BeanShell from 2.1.0 to 2.1.1

Port bsh-2.1.0-src.patch to bsh-2.1.1-src.patch (default Ant target and
makefile.mk stub, plus a source/target 1.6->1.8 bump since 2.1.1's
build.xml sti

Upgrade bundled BeanShell from 2.1.0 to 2.1.1

Port bsh-2.1.0-src.patch to bsh-2.1.1-src.patch (default Ant target and
makefile.mk stub, plus a source/target 1.6->1.8 bump since 2.1.1's
build.xml still hardcodes Java 6 bytecode levels, which JDK 21 rejects
outright). Update makefile.mk and prj/d.lst to reference 2.1.1.

Verified with a real build against the downloaded 2.1.1 source tarball.

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