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='2023-01-09 17:40:54 +0100'>2023-01-09</span></td><td><a href='/guix/commit/nix/libutil/hash.cc?id=407175a1d0e29f45639e7f28a531b3981cd20085'>daemon: Improve error message for wrong hash sizes.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-12-18 01:16:47 +0100'>2022-12-18</span></td><td><a href='/guix/commit/nix/libutil/hash.cc?id=2d4d26769d6a3be1b21302b0bb2bd099fd55ccf8'>daemon: Make "opening file" error messages distinguishable.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>