Add yaml-cpp #680

Job	Run time
prepare_jobs	10s
build (angelscript)	36s
build (argtable2)	28s
build (bzip2)	41s
build (cjson)	26s
build (eigen3)	35s
build (enet)	30s
build (expat)	34s
build (glm)	33s
build (jpeg)	45s
build (jsoncpp)	37s
build (kubridge)	24s
build (libbulletml)	32s
build (libconfuse)	46s
build (libdumb)	30s
build (libintrafont)	24s
build (libmad)	21s
build (libmikmod)	43s
build (libmodplug)	29s
build (libogg)	33s
build (libpspexploit)	26s
build (libpspvram)	27s
build (libun7zip)	22s
build (libxmp)	42s
build (libxmp-lite)	37s
build (libyaml)	28s
build (lua)	27s
build (lua51)	28s
build (mbedtls)	34s
build (mini18n)	25s
build (openal)	55s
build (pocketpy)	1m 1s
build (polarssl)	27s
build (pspgl)	29s
build (pspirkeyb)	28s
build (sqlite)	34s
build (squirrel)	41s
build (yaml-cpp)	37s
build (zlib)	22s
build_depends (curl)	1m 18s
build_depends (libpng freetype2)	39s
build_depends (libpng)	27s
build_depends (libvorbis)	1m 11s
build_depends (libzip)	48s
build_depends (libpng minizip)	34s
build_depends (libpng freetype2 opentri)	40s
build_depends (libpng pixman)	56s
build_depends (sdl)	1m 6s
build_depends (libpng freetype2 sdl sdl-gfx)	1m 25s
build_depends (libpng sdl sdl-image)	1m 15s
build_depends (libvorbis sdl sdl-mixer)	1m 24s
build_depends (libpng freetype2 sdl sdl-ttf)	1m 22s
build_depends (sdl2)	1m 7s
build_depends (sdl2 sdl2-gfx)	1m 18s
build_depends (libpng sdl2 sdl2-image)	1m 25s
build_depends (libvorbis sdl2 sdl2-mixer)	1m 18s
build_depends (libpng freetype2 sdl2 sdl2-ttf)	1m 24s
build_depends (sdl smpeg)	1m 10s
build_depends (zziplib)	35s
create_release	0s
docker-layer	0s
	42m 29s

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