dv, gtk, qt, osxaudio, osxvideo, waveform: add to plugins list

Makes sure the paths for these plugins are included in the
uninstalled plugin paths list. And also for the docs.

Fixes #604

ext/dv/meson.build

@@ -18,7 +18,7 @@ if dv_dep.found()
     install_dir : plugins_install_dir,
   )
   pkgconfig.generate(gstdv, install_dir : plugins_pkgconfig_install_dir)
-
+  plugins += [gstdv]
   # FIXME
   #executable('smpte_test',
   #  'smpte_test.c', 'gstsmptetimecode.c',

ext/gtk/meson.build

@@ -53,5 +53,6 @@ if gtk_dep.found()
     install_dir : plugins_install_dir,
   )
   pkgconfig.generate(gstgtk, install_dir : plugins_pkgconfig_install_dir)
+  plugins += [gstgtk]
 endif
 

ext/qt/meson.build

@@ -160,6 +160,7 @@ if have_cxx and build_gstgl
         install: true,
         install_dir : plugins_install_dir)
       pkgconfig.generate(gstqmlgl, install_dir : plugins_pkgconfig_install_dir)
+      plugins += [gstqmlgl]
     endif
   endif
 endif

sys/osxaudio/meson.build

@@ -41,4 +41,5 @@ if have_osxaudio
     install : true,
     install_dir : plugins_install_dir)
   pkgconfig.generate(gstosxaudio, install_dir : plugins_pkgconfig_install_dir)
+  plugins += [gstosxaudio]
 endif

sys/osxvideo/meson.build

@@ -24,4 +24,5 @@ if have_objc and osxvideo_opengl_dep.found() and osxvideo_cocoa_dep.found()
     install : true,
     install_dir : plugins_install_dir)
   pkgconfig.generate(gstosxvideo, install_dir : plugins_pkgconfig_install_dir)
+  plugins += [gstosxvideo]
 endif

sys/waveform/meson.build

@@ -24,4 +24,5 @@ if have_waveform
     install : true,
     install_dir : plugins_install_dir)
   pkgconfig.generate(gstwaveformsink, install_dir : plugins_pkgconfig_install_dir)
+  plugins += [gstwaveformsink]
 endif