Bootcycle build failures after Nashorn removal

The bootcycle builds fails in tier 4 since the Nashorn removal.

Build log extract:
Error running filter /.../build/macosx-x64-bootcycle-prebuilt/buildtools/manpages/pandoc-troff-manpage-filter:
fd:13: hClose: resource vanished (Broken pipe)
make[3]: *** [/.../build/macosx-x64-bootcycle-prebuilt/support/markdown/BUILD_MAN_PAGES_keytool.md_post.tmp] Error 83
LauncherCommon.gmk:229: recipe for target '/.../build/macosx-x64-bootcycle-prebuilt/support/markdown/BUILD_MAN_PAGES_keytool.md_post.tmp' failed
make[2]: *** [java.base-launchers] Error 2
make/Main.gmk:221: recipe for target 'java.base-launchers' failed
make[2]: *** Waiting for unfinished jobs....