desktopd/jpm.sh: Hack SDK-based Firefox extensions without Node.js: Pure `/bin/sh` alternative to `jpm`

nord-stream 9630a3e1ca Fixed Emacs modelines		%!s(int64=8) %!d(string=hai) anos
..
jpm-build.sh	9630a3e1ca Fixed Emacs modelines	%!s(int64=8) %!d(string=hai) anos
jpm-optimize-signed-build.sh	9630a3e1ca Fixed Emacs modelines	%!s(int64=8) %!d(string=hai) anos
jpm-run.sh	9630a3e1ca Fixed Emacs modelines	%!s(int64=8) %!d(string=hai) anos