By default 'mutt' embeds configure flags and the output of 'gcc -v',
which contains the store file name of Bash and GCC.  This patch makes
sure we don't embed a reference to these in 'mutt'.

diff --git a/txt2c.sh b/txt2c.sh
index f634bb9..53845cf 100755
--- a/txt2c.sh
+++ b/txt2c.sh
@@ -21,6 +21,8 @@ txt2c_fallback () {
 	echo ";"
 }
 
+echo "unsigned char $1[] = \"value of '$1' not kept\";"
+exit 0
 if ./txt2c test </dev/null >/dev/null 2>&1; then
     ./txt2c "$1"
 else
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<div class='path'>path: <a href='/guix/log/?id=df8dd9caedc894be74e6c3ed8dcb79c8fde774de'>root</a>/<a href='/guix/log/gnu?id=df8dd9caedc894be74e6c3ed8dcb79c8fde774de'>gnu</a>/<a href='/guix/log/gnu/packages?id=df8dd9caedc894be74e6c3ed8dcb79c8fde774de'>packages</a>/<a href='/guix/log/gnu/packages/apparmor.scm?id=df8dd9caedc894be74e6c3ed8dcb79c8fde774de'>apparmor.scm</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/gnu/packages/apparmor.scm?id=df8dd9caedc894be74e6c3ed8dcb79c8fde774de&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2022-12-04 23:08:20 +0100'>2022-12-04</span></td><td><a href='/guix/commit/gnu/packages/apparmor.scm?id=84424ae3c91c82c5d1b10728ba131b07d3acbb7a'>gnu: libapparmor: Restrict supported systems to GNU/Linux.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/apparmor.scm (libapparmor)[supported-systems]: New
field.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-12-04 23:08:20 +0100'>2022-12-04</span></td><td><a href='/guix/commit/gnu/packages/apparmor.scm?id=cbab7c1b3c0aa691bf407a7daf168ea790163dde'>gnu: Add pam-apparmor.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/apparmor.scm (pam-apparmor): New variable.

Co-authored-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Hilton Chain</td></tr>
<tr><td><span title='2022-12-04 23:08:20 +0100'>2022-12-04</span></td><td><a href='/guix/commit/gnu/packages/apparmor.scm?id=cb01e0a272cdeb5e4cf27c1f336ebae0550b02d3'>gnu: Add apparmor.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/apparmor.scm (apparmor): New variable.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Hilton Chain</td></tr>
<tr><td><span title='2022-12-04 23:08:20 +0100'>2022-12-04</span></td><td><a href='/guix/commit/gnu/packages/apparmor.scm?id=3a52318e60fa71b18b8473ca99e1e83d16c35d01'>gnu: Add libapparmor.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/apparmor.scm: New file.
(libapparmor): New variable.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add the file.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Hilton Chain</td></tr>