Some Haskell ports: Mark BROKEN on aarch64.

These ports are failing on build cluster for some time. I tried reproducing
it locally and it turned out to be a strange heisenbug - the compiler crashes
when compiling different unrelated files and restarting the build makes the
problem go away.

I wasn't able to extract a minimal reproducing testcase, so didn't contact
upstream.

Mark BROKEN for now and hope for a new compiler version to work.
Reported by:	pkg-fallout

devel/hs-git-annex/Makefile

@@ -9,6 +9,8 @@ WWW=		https://git-annex.branchable.com/
 
 LICENSE=	GPLv3
 
+BROKEN_aarch64=	compiler crashes
+
 BUILD_DEPENDS=	rsync:net/rsync \
 		git:devel/git \
 		gsha256sum:sysutils/coreutils

devel/hs-haskell-language-server/Makefile

@@ -8,6 +8,8 @@ WWW=		https://github.com/haskell/haskell-language-server/
 
 LICENSE=	APACHE20
 
+BROKEN_aarch64=	compiler crashes
+
 FLAVORS=	default ghc810
 FLAVOR?=	${FLAVORS:[1]}
 .if ${FLAVOR:U} != default

devel/stack/Makefile

@@ -9,6 +9,8 @@ WWW=		https://www.haskellstack.org/
 
 LICENSE=	BSD3CLAUSE
 
+BROKEN_aarch64=	compiler crashes
+
 RUN_DEPENDS=	ca_root_nss>0:security/ca_root_nss \
 		gmake:devel/gmake \
 		${LOCALBASE}/lib/compat/libffi.so.6:devel/libffi321 \

lang/purescript/Makefile

@@ -8,6 +8,8 @@ WWW=		https://www.purescript.org/
 
 LICENSE=	BSD3CLAUSE
 
+BROKEN_aarch64=	compiler crashes
+
 USES=		cabal
 
 USE_LOCALE=	en_US.UTF-8