Bug 8136 Changes the expected lenght of 100$a in rebuild_zebra.pl

Bug 8136 Changes the expected lenght of 100$a in rebuild_zebra.pl

In rebuild_zebra.pl, if we are in "unimarc" ("marcflavour" syspref), the sub "fix_unimarc_100" is called and checks if 100$a lenght is equal to 35.
If it is not the case, the sub inserts the localtime and more, so we loose the datas in reindexing.
The standart lenght is 36.
I have just changed 35 to 36.

Signed-off-by: Sophie Meynieux <sophie.meynieux@biblibre.com>
Signed-off-by: Paul Poulain <paul.poulain@biblibre.com>