[ADD] base: add Tagalog language

This is the first move to replace Filipino by Tagalog language

Using Filipino (code fil_PH) is problematic as conflicts with Finnish
(code fi_FI) and users having their browser in Finnish were redirected
to the Filipino version of the website (cf discussion at opw-2172710).

This problem was also raised in other softwares like in the below
discssion in Mozilla L10N groups
https://groups.google.com/forum/#!topic/mozilla.dev.l10n/TW2qYyDDNoE



Quoting the discussion in above thread:

> Filipino is the national language of the Philippines, but it is
> commonly referred to (and registered as) Tagalog, since most of the
> terms therein were derived from it (Tagalog).

This commit targets the 12.0 and adds a new language.
In master (future 14.0 as of today), the Filipino will be dropped.
As fil_PH is only translated on odoo-com project but remains at 0% in
other Transifex project, it is assumed the language switch won't
impact too many people.

closes odoo/odoo#43633

Signed-off-by: Olivier Dony (odo) <odo@openerp.com>

odoo/addons/base/data/res.lang.csv

@@ -77,6 +77,7 @@ base.lang_my,"Burmese / ဗမာစာ",my_MM,my,"Left-to-Right","[3,3]",".",",
 "base.lang_es","Spanish / Español","es_ES","es","Left-to-Right","[3,0]",",",".","%d/%m/%Y","%H:%M:%S","True","1"
 "base.lang_sv_SE","Swedish / Svenska","sv_SE","sv","Left-to-Right","[3,0]",","," ","%Y-%m-%d","%H:%M:%S","True","1"
 "base.lang_th","Thai / ภาษาไทย","th_TH","th","Left-to-Right","[3,0]",".",",","%d/%m/%Y","%H:%M:%S","True","7"
+"base.lang_tl","Tagalog / Filipino","tl_PH","tl","Left-to-Right","[3,0]",".",",","%m/%d/%y","%H:%M:%S","True","1"
 "base.lang_tr","Turkish / Türkçe","tr_TR","tr","Left-to-Right","[3,0]",",",".","%d-%m-%Y","%H:%M:%S","True","1"
 "base.lang_uk_UA","Ukrainian / українська","uk_UA","uk","Left-to-Right","[3,0]",","," ","%d.%m.%Y","%H:%M:%S","True","1"
 "base.lang_vi_VN","Vietnamese / Tiếng Việt","vi_VN","vi","Left-to-Right","[3,0]",",",".","%d/%m/%Y","%H:%M:%S","True","1"