Add Argdata.

The existing cloudabi-utils package has a copy of a library called
Argdata integrated. Future versions of cloudabi-utils will no longer
ship with it, as Argdata can be used independently of CloudABI.

This change introduces a new devel/argdata port, which can be used by
future versions of cloudabi-utils.

Approved by:	bapt
Differential Revision:	https://reviews.freebsd.org/D9799

devel/Makefile

@@ -106,6 +106,7 @@
     SUBDIR += arduino-sevseg
     SUBDIR += arduino-tools
     SUBDIR += arduino16
+    SUBDIR += argdata
     SUBDIR += argouml
     SUBDIR += argp-standalone
     SUBDIR += argtable

devel/argdata/Makefile

+# Created by: Ed Schouten <ed@FreeBSD.org>
+# $FreeBSD$
+
+PORTNAME=	argdata
+PORTVERSION=	0.1
+DISTVERSIONPREFIX=v
+CATEGORIES=	devel
+
+MAINTAINER=	ed@FreeBSD.org
+COMMENT=	Binary serialisation format inspired by YAML, MessagePack and nvlists
+
+LICENSE=	BSD2CLAUSE
+
+USE_GITHUB=	yes
+GH_ACCOUNT=	NuxiNL
+
+USES=		cmake compiler:c11 tar:xz
+USE_LDCONFIG=	yes
+
+.include <bsd.port.mk>

devel/argdata/distinfo

+TIMESTAMP = 1488022001
+SHA256 (NuxiNL-argdata-v0.1_GH0.tar.gz) = 1fd26745e72382b9e0eda042154b3219682de980f6cdd15f574f9d4288b7df79
+SIZE (NuxiNL-argdata-v0.1_GH0.tar.gz) = 18787

devel/argdata/pkg-descr

+Argdata is a binary serialisation format similar to FreeBSD's nvlists.
+It differs from nvlists in that it uses data types that are more similar
+to YAML.
+
+Argdata is used by CloudABI as a replacement for string command line
+arguments and environment variables. CloudABI processes can start new
+processes by passing them a YAML-like tree of arguments, having file
+descriptors of resources annotated to the tree.
+
+This package provides a native port of the Argdata library, so that it
+can be used in native FreeBSD applications, but also to spawn CloudABI
+processes appropriately.
+
+WWW: https://github.com/NuxiNL/argdata

devel/argdata/pkg-plist

+include/argdata.h
+include/argdata.hpp
+lib/libargdata.so
+lib/libargdata.so.1