FreeBSD/ports d2fc273 (r482197)Mk bsd.gecko.mk, Mk/Uses gecko.mk

www/firefox: update to 63.0

Changes:        https://www.mozilla.org/firefox/63.0/releasenotes/
PR:             229893
Security:       7c3a02b9-3273-4426-a0ba-f90fad2ff72e
MFH:            2018Q4
Differential Revision:  https://reviews.freebsd.org/D16356
DeltaFile
+199-199www/firefox-i18n/distinfo
+14-14www/firefox/files/patch-bug847568
+0-27www/firefox/files/patch-bug1448770
+4-5www/firefox/Makefile
+6-1Mk/bsd.gecko.mk
+3-3www/firefox/distinfo
+2-2Mk/Uses/gecko.mk
+2-2www/firefox/files/patch-bug1288587
+2-2www/firefox-i18n/Makefile
+232-2559 files

UnifiedSplitRaw