Tor Browser: sync unveil changes from firefox-esr

Original commit message from landry@:
"www/firefox-esr:  add some missing unveils

- content process already accesses /etc/localtime, add /usr/share/zoneinfo
- main process already has /usr/share/zoneinfo, add /etc/localtime
- main process sometimes parses /etc/hosts (mostly on network.trr.mode
changes ?) so unveil it.
- unveil.socket is wrong but time is running out, and the socket process
isnt used much anyway (network.http.network_access_on_socket_process.enabled defaults to false)

required by upcoming changes to pledge/unveil"

www/tor-browser/browser/Makefile

@@ -12,6 +12,7 @@ EXTRACT_SUFX =		.tar.xz
 
 PKGNAME =		${TB_PREFIX}-browser-${TB_VERSION:S/a/alpha/}
 DISTNAME =		src-firefox-tor-browser-140.8.0esr-15.0-1-build3
+REVISION =		0
 
 FIX_EXTRACT_PERMISSIONS	= Yes
 DISTFILES +=		${DISTNAME}.tar.xz \

www/tor-browser/browser/files/unveil.content

@@ -6,6 +6,7 @@
 /usr/local/lib r
 /usr/local/share r
 /usr/share/locale r
+/usr/share/zoneinfo r
 /var/cache/fontconfig r
 /usr/X11R6/lib r
 /usr/lib r

www/tor-browser/browser/files/unveil.main

@@ -14,6 +14,7 @@
 
 # normally "pledge dns" exempts this from unveil, but pledge might be disabled
 /etc/resolv.conf r
+/etc/hosts r
 
 /usr/local/bin/lyrebird rx
 /usr/local/bin/tor rx
@@ -21,6 +22,7 @@
 /usr/local/lib/tor-browser rx
 /usr/local/share r
 /usr/share/locale r
+/etc/localtime r
 /usr/share/zoneinfo r
 /var/cache/fontconfig r
 /usr/X11R6/lib r