Add the 'restrict' qualifier to match the 'gettimeofday' declaration found
in glibc 2.31.

--- datefudge-1.23/datefudge.c	2020-02-17 22:35:21.343341725 +0100
+++ datefudge-1.23/datefudge.c	2020-02-17 22:35:49.619117874 +0100
@@ -78,6 +78,6 @@
     return 0;
 }
 
-int gettimeofday(struct timeval *x, struct timezone *y) {
+int gettimeofday(struct timeval *restrict x, void *restrict y) {
     return __gettimeofday(x,y);
 }
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<tr><td><span title='2017-02-06 10:51:25 +0100'>2017-02-06</span></td><td><a href='/guix/commit/gnu/packages/re2c.scm?id=cc1c3977d54728280ec6649e1883912b1226e63f'>gnu: Add re2c.</a><span class='msg-avail'>...</span></td><td>Sergei Trofimovich</td></tr>