Make gzip-1.2.4 and tar-1.12 not include timestamps

There is no way for gzip 1.2.4 and tar 1.12 to disable the inclusion of
timestamps into the tarball/gzip, which creates non-reproducible
tarballs and hence packages.

While it is theoretically possible to set the timestamps to unix time 0
using touch, in reality this is not possible because mes libc does not
support utime() which sets the timestamp of a file from userspace. So we
need to ignore it rather than (re)set it.

sysa/tar-1.12/tar-1.12.kaem

@@ -18,6 +18,8 @@ untar ../src/${pkg}.tar
 cd ${pkg}
 
 cp ../../files/getdate_stub.c lib/getdate_stub.c
+catm src/create.c.new ../../files/stat_override.c src/create.c
+cp src/create.c.new src/create.c
 
 # Compile