Always provide the same date and time in 'Py_GetBuildInfo'.
This is the information shown at the REPL and in 'sys.version'.
We cannot pass it in CPPFLAGS due to whitespace in the DATE string.

--- a/Modules/getbuildinfo.c
+++ b/Modules/getbuildinfo.c
@@ -4,6 +4,10 @@
 #include <stdio.h>
 #endif
 
+/* Deterministic date and time.  */
+#define DATE "Jan  1 1970"
+#define TIME "00:00:01"
+
 #ifndef DATE
 #ifdef __DATE__
 #define DATE __DATE__
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<tr class='logheader'><td><span title='2021-10-14 00:24:34 +0200'>2021-10-14</span></td><td class='logsubject'><a href='/guix/commit/etc/git?id=f8b10932c86cf4c1657a67e8c484d76f757b64bd'>Add git configuration templates to improve diff hunk header detection.</a></td><td>Sarah Morgensen</td></tr>
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This is a follow-up to commit 9fc8ae4171e5da4939a64fc6d684c8b9d85bbe84, which
missed two hunks from &lt;https://issues.guix.gnu.org/50363&gt;.

Reported by hackeryarn on #guix.

* .gitattributes, etc/git/gitconfig: New files.

Signed-off-by: Marius Bakke &lt;marius@gnu.org&gt;


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<tr class='logheader'><td><span title='2020-12-14 12:15:06 -0500'>2020-12-14</span></td><td class='logsubject'><a href='/guix/commit/etc/git?id=80ebcdd100a82fdc582e62f35042c74ce38ea753'>maint: Only run `make authenticate` when pushing commits.</a></td><td>Leo Famulari</td></tr>
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* etc/git/pre-push: Exit early when deleting a branch.


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<tr class='logheader'><td><span title='2020-06-01 00:51:38 +0200'>2020-06-01</span></td><td class='logsubject'><a href='/guix/commit/etc/git?id=6f6758c45d3913dbf98bb8e50f21f7bfb25b40ea'>maint: Adjust comment in 'pre-push' hook.</a></td><td>Ludovic Courtès</td></tr>
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* etc/git/pre-push: Adjust comment.


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<tr class='logheader'><td><span title='2020-05-29 18:31:38 +0200'>2020-05-29</span></td><td class='logsubject'><a href='/guix/commit/etc/git?id=e65a44649e8d7698c4a888f1de625a67052520e9'>maint: Git pre-push hook runs "make authenticate check-channel-news".</a></td><td>Ludovic Courtès</td></tr>
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* etc/git/pre-push: Change to run "make authenticate check-channel-news".


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