Integrate a patch to fix cURL detection

The patch has been submitted upstream, but some users depend on it now, so ship
it:
https://github.com/puppetlabs/facter/pull/1762

sysutils/facter/Makefile

@@ -2,6 +2,7 @@
 
 PORTNAME=	facter
 PORTVERSION=	3.12.1
+PORTREVISION=	1
 CATEGORIES?=	sysutils
 MASTER_SITES=	https://downloads.puppetlabs.com/facter/
 

sysutils/facter/files/patch-CMakeLists.txt

@@ -0,0 +1,11 @@
+--- CMakeLists.txt.orig	2018-10-23 22:00:38 UTC
++++ CMakeLists.txt
+@@ -52,7 +52,7 @@ SET(LEATHERMAN_COMPONENTS locale catch n
+ 
+ # We look for curl early, because whether or not we link to the leatherman curl library
+ # is dependant on whether or not we find curl on the system.
+-if ((("${CMAKE_SYSTEM_NAME}" MATCHES "Linux|OpenBSD") OR WIN32) AND NOT WITHOUT_CURL)
++if ((("${CMAKE_SYSTEM_NAME}" MATCHES "FreeBSD|Linux|OpenBSD") OR WIN32) AND NOT WITHOUT_CURL)
+     find_package(CURL)
+     if (CURL_FOUND)
+         add_definitions(-DUSE_CURL)