[sysprof] build: update some dependency versions

[Christian Hergert <chergert src gnome org>]

commit e77310a5116f5243a318a445600694938d55181d
Author: Christian Hergert <chergert redhat com>
Date:   Wed May 8 19:10:45 2019 -0700

    build: update some dependency versions
    
    These might give us a chance to work on Debian stable.

 meson.build              | 3 ++-
 src/sysprofd/meson.build | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index b0fd4b3..56872a9 100644
--- a/meson.build
+++ b/meson.build
@@ -17,8 +17,9 @@ version_split = meson.project_version().split('.')
 datadir = get_option('datadir')
 podir = join_paths(meson.source_root(), 'po')
 
-glib_req_version = '>= 2.56'
+glib_req_version = '>= 2.50'
 gtk_req_version = '>= 3.22'
+polkit_req_version = '>= 0.105'
 
 cc = meson.get_compiler('c')
 cxx = meson.get_compiler('cpp')
diff --git a/src/sysprofd/meson.build b/src/sysprofd/meson.build
index 4ddc856..2586788 100644
--- a/src/sysprofd/meson.build
+++ b/src/sysprofd/meson.build
@@ -19,6 +19,7 @@ sysprofd_deps = [
   dependency('glib-2.0', version: glib_req_version),
   dependency('gio-2.0', version: glib_req_version),
   dependency('gio-unix-2.0', version: glib_req_version),
+  dependency('polkit-gobject-1', version: polkit_req_version),
 ]
 
 sysprofd = executable('sysprofd', sysprofd_sources,