broken ports with latest ghostscript and ImageMagick

[dyne2meter]

Here's the end of the output from my attempt at rev-upgrade:

DEBUG: Ignoring loadcommand containing @executable_path in /opt/local/libexec/ld64/ld-latest
Could not open libgs.9.21.dylib: Error opening or reading file (referenced from /opt/local/bin/gsc)
libgs.9.21.dylib seems to be referenced using a relative path. This may be a problem with its canonical library name and require the use of install_name_tool(1) to fix.
DEBUG: Marking /opt/local/bin/gsc as broken
DEBUG: Marking /opt/local/bin/gsx as broken
DEBUG: Marking /opt/local/lib/ImageMagick-6.9.8/modules-Q16/coders/pdf.so as broken
DEBUG: Marking /opt/local/lib/ImageMagick-6.9.8/modules-Q16/coders/ps.so as broken
--->  Found 4 broken files, matching files to ports
Error: Port ghostscript is still broken after rebuilding it more than 3 times.
DEBUG: rev-upgrade failed: Port ghostscript still broken after rebuilding 3 times

If more documentation is needed, please leave detailed instructions on how to obtain.

[mf2k (Frank Schima)]

Duplicate of #54019.