lang/ghc: Update to 8.4.3 and bump PORTREVISION's of all Haskell ports.

As usual, it is recommended to rebuild or reinstall all the
dependent ports and the lang/ghc port itself in one of the following
ways:

# portmaster -w -r ghc
  or
# portupgrade -fr lang/ghc

In case of pkg(8), it is probably safer to remove all the GHC-dependent
packages along with GHC and reinstall everything from scratch.  For
example:

# pkg query "%ro" ghc > ghc-pkgs.txt
# pkg delete -y lang/ghc

In ghc-pkgs.txt, check and remove all the packages that have been moved
on the update, then use this command:

# pkg install -y `cat ghc-pkgs.txt`

Approved by:	tcberner (mentor)
Differential Revision:	https://reviews.freebsd.org/D16038

databases/hs-persistent-sqlite/Makefile

@@ -2,6 +2,7 @@
 
 PORTNAME=	persistent-sqlite
 PORTVERSION=	2.8.1.2
+PORTREVISION=	1
 CATEGORIES=	databases haskell
 
 MAINTAINER=	haskell@FreeBSD.org