Do not capture the build-time value of $PATH in the 'emacs' executable
since this can noticeably increase the size of the closure of Emacs
with things like GCC being referenced.

--- a/lisp/loadup.el
+++ b/lisp/loadup.el
@@ -481,7 +481,8 @@ lost after dumping")))
                         ((equal dump-mode "dump") "emacs")
                         ((equal dump-mode "bootstrap") "emacs")
                         ((equal dump-mode "pbootstrap") "bootstrap-emacs.pdmp")
-                        (t (error "unrecognized dump mode %s" dump-mode)))))
+                        (t (error "unrecognized dump mode %s" dump-mode))))
+          (exec-path nil))
       (message "Dumping under the name %s" output)
       (condition-case ()
           (delete-file output)
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<div class='path'>path: <a href='/guix/log/?id=b6a726222a8ef3bfe46402a46b15d79c6b19b6d6'>root</a>/<a href='/guix/log/etc?id=b6a726222a8ef3bfe46402a46b15d79c6b19b6d6'>etc</a>/<a href='/guix/log/etc/snippets?id=b6a726222a8ef3bfe46402a46b15d79c6b19b6d6'>snippets</a>/<a href='/guix/log/etc/snippets/text-mode?id=b6a726222a8ef3bfe46402a46b15d79c6b19b6d6'>text-mode</a>/<a href='/guix/log/etc/snippets/text-mode/guix-commit-message-rename-package?id=b6a726222a8ef3bfe46402a46b15d79c6b19b6d6'>guix-commit-message-rename-package</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/etc/snippets/text-mode/guix-commit-message-rename-package?id=b6a726222a8ef3bfe46402a46b15d79c6b19b6d6&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2019-03-26 14:18:12 +0100'>2019-03-26</span></td><td><a href='/guix/commit/etc/snippets/text-mode/guix-commit-message-rename-package?id=6994e6743603ab73cc32d32786a55672f4fa46f0'>etc: Add "rename" snippet.</a><span class='msg-avail'>...<span class='msg-tooltip'>* etc/snippets/text-mode/guix-commit-message-rename-package: New file.
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