tzdata: Make installation POSIX conformant

From the Linux From Scratch book [1]:

> This creates the posixrules file. We use New York because POSIX
> requires the daylight savings time rules to be in accordance with US
> rules.

[1]: http://www.linuxfromscratch.org/lfs/downloads/8.2/LFS-BOOK-8.2-NOCHUNKS.html

tzdata.be0

@@ -46,6 +46,8 @@ mee_install() {
     cp -vax zoneinfo ${D}/${DATADIR}
     cp -v zone.tab zone1970.tab iso3166.tab ${D}/${DATADIR}/zoneinfo
 
+    zic -d ${D}/${DATADIR}/zoneinfo -p America/New_York
+
     mkdir -pv ${D}${SYSCONFDIR}
     cp ${D}${DATADIR}/zoneinfo/${MYTIMEZONE} ${D}${SYSCONFDIR}/localtime
 }