pidgin/pidgin

Fix Meson deprecation from Facebook docs

23 months ago, Elliott Sales de Andrade
ff4332b17f80
Fix Meson deprecation from Facebook docs

Fixes this deprecation:
```
../doc/reference/protocols/facebook/meson.build:25: WARNING: Project targeting '>=0.58.0' but tried to use feature deprecated since '0.56.0': meson.build_root. use meson.project_build_root() or meson.global_build_root() instead.
```

Testing Done:
Reconfigured and saw no warning.

Reviewed at https://reviews.imfreedom.org/r/1555/
##############################################################################
# General Options
option('devenv-config-dir', type : 'string',
description : 'config directory for running a devenv (defaults to a subdirectory of buildroot)')
option('doc', type : 'boolean', value : false,
description : 'build documentation with gtk-doc')
option('extraversion', type : 'string',
description : 'extra version number to be displayed in Help->About and --help (for packagers)')
option('introspection', type : 'boolean', value : true,
description : 'build introspection data')
option('nettle', type : 'feature',
description : 'enable Nettle support')
option('nls', type : 'boolean', value : true,
description : 'enable installation of translation files')
option('pixmaps-install', type : 'boolean', value : true,
description : 'enable installation of pixmap files - Pidgin still needs them!')
option('build-dependencies', type : 'boolean', value : false,
description : 'enable the use of subprojects to build missing dependencies.')
##############################################################################
# Libpurple Options
option('gstreamer-video', type : 'feature',
description : 'compile with GStreamer 1.0 Video Overlay support')
option('kwallet', type : 'feature',
description : 'enable KWallet support')
option('libsecret', type : 'feature',
description : 'enable libsecret support')
option('vv', type : 'feature',
description : 'compile with voice and video support')
option('soup3', type : 'boolean', value : false,
description : 'compile against libsoup3')
##############################################################################
# Protocol Plugins
option('avahi', type : 'feature',
description : 'compile with avahi (required for Bonjour support)')
option('cyrus-sasl', type : 'feature',
description : 'enable Cyrus SASL support for XMPP/IRC')
option('dynamic-prpls', type : 'string', value: 'all',
description : 'specify which protocols to build dynamically')
option('krb4', type : 'boolean', value : false,
description : 'compile Zephyr plugin with Kerberos 4 support')
option('libgadu', type : 'feature',
description : 'compile with libgadu (required for GaduGadu support)')
option('meanwhile', type : 'feature',
description : 'compile with meanwhile')
option('silc', type : 'feature',
description : 'compile with SILC plugin')
option('zephyr', type : 'feature',
description : 'compile Zephyr plugin against external libzephyr')
##############################################################################
# Pidgin Options
option('console-logging', type : 'boolean', value : false,
description : 'compile with console logging support')
option('gtkui', type : 'boolean', value : true,
description : 'compile with GTK+ user interface')
option('unity-integration', type : 'feature',
description : 'compile with support for unity integration plugin')
##############################################################################
# Finch Options
option('consoleui', type : 'boolean', value : true,
description : 'compile with console user interface')
option('x', type : 'boolean', value : true)