meson: doc: Fix building documentation when using subprojects
authorThibault Saunier <tsaunier@gnome.org>
Thu, 25 Aug 2016 18:04:54 +0000 (15:04 -0300)
committerThibault Saunier <tsaunier@gnome.org>
Thu, 25 Aug 2016 18:15:05 +0000 (15:15 -0300)
commit2b9863c8b55b2810b517295b137f5ab94b167b5f
tree6ea9d5b7bd3b4ff29e7b9b709bcedd3e36892070
parentd4af1b6c9a17122f87f685095f7d82b7ebb953d3
meson: doc: Fix building documentation when using subprojects

And check the presence of gtk-doc before building the documentation
docs/libs/meson.build
meson.build