cad/gmsh: update to version 2.15.0

Upstream changes:

- fixed several regressions (multi-file partitioned grid export, mesh
  subdivision, old compound mesher)
- improved 2D boundary layer field & removed non-functional 3D boundary
  layer field
- faster rendering of large meshes

Approved by:	swills (mentor)
Differential Revision:	https://reviews.freebsd.org/D8725

cad/gmsh/Makefile

@@ -2,8 +2,7 @@
 # $FreeBSD$
 
 PORTNAME=	gmsh
-PORTVERSION=	2.14.1
-PORTREVISION=	1
+PORTVERSION=	2.15.0
 CATEGORIES=	cad
 MASTER_SITES=	http://gmsh.info/src/
 DISTNAME=	${PORTNAME}-${PORTVERSION}-source
@@ -31,7 +30,7 @@ SLAVEDIRS=	cad/gmsh-occ
 
 USES=		blaslapack cmake fortran gmake jpeg tar:tgz
 USE_GL=		gl glu
-USE_XORG=	x11 xext xfixes xft
+USE_XORG=	x11 xcursor xext xinerama xfixes xft
 
 MAKE_JOBS_UNSAFE=yes
 

cad/gmsh/distinfo

@@ -1,3 +1,3 @@
-TIMESTAMP = 1478148802
-SHA256 (gmsh/gmsh-2.14.1-source.tgz) = 27f44fd47b0629a1eedf209f0f21e482545a6ffae18e8527f2356b230fb95def
-SIZE (gmsh/gmsh-2.14.1-source.tgz) = 10860112
+TIMESTAMP = 1481064311
+SHA256 (gmsh/gmsh-2.15.0-source.tgz) = 992a4b580454105f719f5bc05441d3d392ab0b4b80d4ea07b61ca3bdc974070a
+SIZE (gmsh/gmsh-2.15.0-source.tgz) = 10865829