devel/plasma: Fix BUILD_DEPENDS after 26194763

* The recently updated devel/py-capstone, which is used as RUN_DEPENDS
  pulls in devel/capstone which leads to conflicting dependendies with
  devel/capstone4 which is installed prior during the build phase.

  Fix the issue by switching the BUILD_DEPENDS to devel/capstone.

* Bump PORTREVISION due changed package contents as the shared libs are
  created from the more recent devel/capstone.

Reported by:	pkg-fallout

devel/plasma/Makefile

 PORTNAME=	plasma
 DISTVERSION=	g20180708
-PORTREVISION=	1
+PORTREVISION=	2
 CATEGORIES=	devel python
 
 MAINTAINER=	kai@FreeBSD.org
@@ -12,7 +12,7 @@ LICENSE_FILE=	${WRKSRC}/LICENSE
 
 BUILD_DEPENDS=	bash:shells/bash \
 		binutils>=2:devel/binutils \
-		capstone4>=3:devel/capstone4
+		capstone>=3:devel/capstone
 RUN_DEPENDS=	binutils>=2:devel/binutils \
 		${PYTHON_PKGNAMEPREFIX}capstone>=3:devel/py-capstone@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}future>=0:devel/py-future@${PY_FLAVOR} \