Heads up: recent changes may require recompiling Eshell files

[Jim Porter]

Just a quick note for Eshell users: commit 
3a388ab4a604f868ab2c1f9b3c63a7f7a3221f7f (part of bug#53715) recently 
merged, which changes some defsubsts and macros in a way that will 
probably require recompiling the Eshell sources. The following should be 
sufficient:

  rm lisp/eshell/*.elc test/lisp/eshell/*.elc && make

Otherwise, `make bootstrap' will do the trick, but of course that takes 
longer.

I have one more set of Eshell changes in progress that might require 
doing this again, but hopefully the long-term benefits outweigh the 
temporary hiccups with incremental builds. :)

- Jim