Update to 0.2.5

Build now explicitly requires gmake

per https://github.com/yaml/libyaml/releases/tag/0.2.5
the following changes have been made

- #105
  Allow question marks in plain scalars in flow collections

- #186
  Emitter: Don't output trailing space for empty scalar nodes

- #185
  Emitter: Output space after an alias mapping key

- #187
  Add -h and --flow (on|off|keep) to run-*-test-suite

- #182
  Remove unnecessary include and malloc

- #177
  Add specific files back to .gitignore

- #181
  Output error position in run-parser-test-suite.c

- #191
  A couple patches to improve test suite support

- #179
  Flow indicators can not be part of local or shorthand tags

PR:	247043
Submitted by:	daniel.engberg.lists@pyret.net

textproc/libyaml/Makefile

@@ -2,7 +2,7 @@
 # $FreeBSD$
 
 PORTNAME=	libyaml
-PORTVERSION=	0.2.4
+PORTVERSION=	0.2.5
 CATEGORIES=	textproc
 MASTER_SITES=	https://pyyaml.org/download/libyaml/
 DISTNAME=	yaml-${PORTVERSION}
@@ -13,7 +13,7 @@ COMMENT=	YAML 1.1 parser and emitter written in C
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/License
 
-USES=		cpe libtool pathfix
+USES=		cpe gmake libtool pathfix
 
 GNU_CONFIGURE=	yes
 

textproc/libyaml/distinfo

@@ -1,3 +1,3 @@
-TIMESTAMP = 1587538937
-SHA256 (yaml-0.2.4.tar.gz) = d80aeda8747b7c26fbbfd87ab687786e58394a8435ae3970e79cb97882e30557
-SIZE (yaml-0.2.4.tar.gz) = 608448
+TIMESTAMP = 1591522833
+SHA256 (yaml-0.2.5.tar.gz) = c642ae9b75fee120b2d96c712538bd2cf283228d2337df2cf2988e3c02678ef4
+SIZE (yaml-0.2.5.tar.gz) = 609454

textproc/libyaml/pkg-plist

@@ -1,6 +1,6 @@
 include/yaml.h
 lib/libyaml-0.so.2
-lib/libyaml-0.so.2.0.8
+lib/libyaml-0.so.2.0.9
 lib/libyaml.a
 lib/libyaml.so
 libdata/pkgconfig/yaml-0.1.pc