Remove/patch metadata timestamps for reproducibility.

diff -ur fpcbuild-3.0.0.old/fpcsrc/packages/fpmkunit/src/fpmkunit.pp fpcbuild-3.0.0/fpcsrc/packages/fpmkunit/src/fpmkunit.pp
--- fpcbuild-3.0.0.old/fpcsrc/packages/fpmkunit/src/fpmkunit.pp	2015-11-04 16:17:00.000000000 -0500
+++ fpcbuild-3.0.0/fpcsrc/packages/fpmkunit/src/fpmkunit.pp	2017-01-26 16:25:29.327339282 -0500
@@ -3779,7 +3779,7 @@
       Values[KeyName]:=Name;
       Values[KeyVersion]:=Version;
       // TODO Generate checksum based on PPUs
-      InstalledChecksum:=DateTimeToFileDate(Now);
+      InstalledChecksum:=0;
       Values[KeyChecksum]:=IntToStr(InstalledChecksum);
       Values[KeyCPU]:=CPUToString(ACPU);
       Values[KeyOS]:=OSToString(AOS);
diff -ur fpcbuild-3.0.0.old/fpcsrc/utils/fpcmkcfg/fpcmkcfg.pp fpcbuild-3.0.0/fpcsrc/utils/fpcmkcfg/fpcmkcfg.pp
--- fpcbuild-3.0.0.old/fpcsrc/utils/fpcmkcfg/fpcmkcfg.pp	2013-06-01 18:27:16.000000000 -0400
+++ fpcbuild-3.0.0/fpcsrc/utils/fpcmkcfg/fpcmkcfg.pp	2017-01-26 16:24:22.949044903 -0500
@@ -234,8 +234,8 @@
   TemplateParser.Values['FPCTARGETOS'] := BuildOSTarget;
   TemplateParser.Values['FPCBIN'] := 'fpc';
   TemplateParser.Values['PWD'] := GetCurrentDir;
-  TemplateParser.Values['BUILDDATE'] := DateToStr(Date);
-  TemplateParser.Values['BUILDTIME'] := TimeToStr(Time);
+  TemplateParser.Values['BUILDDATE'] := '';
+  TemplateParser.Values['BUILDTIME'] := '';
 
   TemplateParser.Values['LOCALREPOSITORY'] := GetDefaultLocalRepository;
   TemplateParser.Values['LOCALBASEPATH'] := GetDefaultLocalBasepath;
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<tr><td><span title='2021-12-13 17:48:25 +0100'>2021-12-13</span></td><td><a href='/guix/commit/gnu/packages/convmv.scm?id=8394619baceb118df92e355377fd543bb1aa501a'>gnu: Simplify package inputs.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-09-25 09:34:36 +0200'>2021-09-25</span></td><td><a href='/guix/commit/gnu/packages/convmv.scm?id=719bbcc15e2216b59bde34f297b92ceb9d349ce0'>Update copyright assignments for Liliana Marie Prikler.</a><span class='msg-avail'>...</span></td><td>Liliana Marie Prikler</td></tr>