cad/horizon-eda: Fix build broken after the recent opencascade update

Also change to llvm-12 (from llvm-10).

Reported by:	fallout

cad/horizon-eda/Makefile

@@ -4,6 +4,9 @@ DISTVERSION=	2.1.0
 PORTREVISION=	1
 CATEGORIES=	cad
 
+PATCH_SITES=	https://github.com/${GH_ACCOUNT}/${GH_PROJECT}/commit/
+PATCHFILES=	0d801d4807cbed405998688b361bf0543207f1b1.patch:-p1 # fixes opencascade-7.6.0 compatibility, see https://github.com/horizon-eda/horizon/issues/623
+
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	EDA package for printed circuit board design
 
@@ -25,15 +28,16 @@ LIB_DEPENDS=	libcurl.so:ftp/curl \
 		libzmq.so:net/libzmq4
 
 USES=		gmake gnome localbase pkgconfig python:build sqlite # compiler:c++17-lang
+USE_GNOME=	atkmm gdkpixbuf2 gtkmm30 librsvg2
+
 USE_GITHUB=	yes
 GH_PROJECT=	horizon
-USE_GNOME=	atkmm gdkpixbuf2 gtkmm30 librsvg2
 
 MAKE_ARGS=	DEBUGFLAGS= OPTIMIZE=
 
 BINARY_ALIAS=	python3=${PYTHON_CMD}
 
-LLVM_VER=	10 # workaround for bug#253551
+LLVM_VER=	12 # workaround for bug#253551
 BUILD_DEPENDS+=	clang${LLVM_VER}:devel/llvm${LLVM_VER}
 CPP=		clang-cpp${LLVM_VER}
 CC=		clang${LLVM_VER}

cad/horizon-eda/distinfo

-TIMESTAMP = 1631174790
+TIMESTAMP = 1637022213
 SHA256 (horizon-eda-horizon-v2.1.0_GH0.tar.gz) = 2ba7a64ef0d8f22ad12e6a5a9c108f865eeb468f954f51ee5fbc03e6a847549a
 SIZE (horizon-eda-horizon-v2.1.0_GH0.tar.gz) = 3140793
+SHA256 (0d801d4807cbed405998688b361bf0543207f1b1.patch) = 64c0200aaf39e967d26d41634fea17db32f779449cd0a05197446e1a973b4d1f
+SIZE (0d801d4807cbed405998688b361bf0543207f1b1.patch) = 2501