This patch adds option to enable or disable xlib-xrender component.
Without it 'xrender' is always required when 'xlib' option is enabled. @sh0

--- meson.build	2020-11-27 01:20:59.000000000 +0200
+++ meson.build	2021-12-01 00:34:50.366334030 +0200
@@ -273,8 +273,8 @@
   endif
 endif
 
-if feature_conf.get('CAIRO_HAS_XLIB_SURFACE', 0) == 1
-  xrender_dep = dependency('xrender', required: get_option('xlib'),
+if feature_conf.get('CAIRO_HAS_XLIB_SURFACE', 0) == 1 and get_option('xlib-xrender').enabled()
+  xrender_dep = dependency('xrender', required: true,
                            version: xrender_required_version)
 
   if xrender_dep.found()
--- meson_options.txt	2020-11-27 01:20:59.000000000 +0200
+++ meson_options.txt	2021-12-01 00:32:43.480337924 +0200
@@ -17,6 +17,7 @@
 option('tee', type : 'feature', value : 'disabled')
 option('xcb', type : 'feature', value : 'auto')
 option('xlib', type : 'feature', value : 'auto')
+option('xlib-xrender', type : 'feature', value : 'disabled')
 #option('xml', type : 'feature', value : 'disabled')
 option('zlib', type : 'feature', value : 'auto') # script, ps, pdf, xml surfaces