[tracker] Revert "build: Require Meson >= 0.50"

[Sam Thursfield <sthursfield src gnome org>]

commit 1f72be40d6364dccdb934e8aa7719ed4b862476d
Author: Sam Thursfield <sam afuera me uk>
Date:   Wed May 1 14:56:04 2019 +0200

    Revert "build: Require Meson >= 0.50"
    
    This reverts commit 17777040c63b7bc8586fa77bfa1219c0d96a9dd9.
    
    Some projects that include Tracker haven't yet updated to Meson 0.50. This
    change broke gnome-build-meta for example:
    https://gitlab.gnome.org/GNOME/gnome-build-meta/-/jobs/286671
    
    The install: arg isn't actually required as for configure_file() targets
    Meson will infer whether an install is needed by the presence of the
    install_dir: arg.

 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index 8888bbc68..f5308ce00 100644
--- a/meson.build
+++ b/meson.build
@@ -1,6 +1,6 @@
 project('tracker', 'c', 'vala',
         version: '2.2.1',
-        meson_version: '>=0.50')
+        meson_version: '>=0.47')
 
 gnome = import('gnome')
 i18n = import('i18n')