Fixes a fatal constness error with g++ 4.8.2.
--- aegis-4.24/common/ac/string/memmem.cc	2008-03-14 07:19:27.000000000 +0100
+++ aegis-4.24/common/ac/string/memmem.cc	2014-01-26 11:17:58.000000000 +0100
@@ -182,7 +182,7 @@
 
     // Use optimizations in memchr when possible.
     if (needle_len == 1)
-        return memchr(haystack, *needle, haystack_len);
+        return (void *) memchr(haystack, *needle, haystack_len);
 
     // Minimizing the worst-case complexity:
     // Let n = haystack_len, m = needle_len.
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<tr><td><span title='2022-10-11 16:05:32 +0200'>2022-10-11</span></td><td><a href='/guix/commit/gnu/packages/language.scm?id=68d79a8b60a1a564a8425de8220fb65dc79ba9ee'>gnu: Add libskk.</a><span class='msg-avail'>...</span></td><td>mirlan</td></tr>
<tr><td><span title='2022-09-01 16:08:14 +0200'>2022-09-01</span></td><td><a href='/guix/commit/gnu/packages/language.scm?id=d57427af57e164f93ffb6d077917e64a6b2ee55c'>gnu: libstemmer: Update to 2.2.0.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2022-09-01 16:08:14 +0200'>2022-09-01</span></td><td><a href='/guix/commit/gnu/packages/language.scm?id=d4640281f3dadb471db214a9da295ea9d27eb16d'>gnu: libstemmer: Add release-monitoring-url and upstream-name properties.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2022-05-31 14:53:45 -0400'>2022-05-31</span></td><td><a href='/guix/commit/gnu/packages/language.scm?id=ed3c97f53ef5d60f103b93d15ccce5db052bfad1'>gnu: language: Remove tegaki packages.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>