Fix a variety of reproducibility issues

Include:
- Not regenerated man pages.
- Automake tarball with bad time (and completely useless).
- Ordering of files within tarballs.
- Resetting timestamp various fixes.
- Older tars not properly overwriting files leading to many issues.
- Weird lack of reproducibility in libtool scripts paths to tools.
- and more

sysa/run.sh

@@ -14,6 +14,7 @@ set -e
 
 export PREFIX=/usr
 export SOURCES=/after
+export DESTDIR="/tmp/destdir"
 
 create_sysb() {
     # Copy everything in