Adjust dylib compatibility versions to match what was set by mesa-18.3's autotools-based builds

Cc: 20.3 21.0 <mesa-stable@lists.freedesktop.org>
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/4113
Signed-off-by: Jeremy Huddleston Sequoia <jeremyhu@apple.com>
Reviewed-by: Dylan Baker <dylan.c.baker@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8796>

src/mapi/es1api/meson.build

@@ -49,6 +49,7 @@ libglesv1_cm = shared_library(
   dependencies : [dep_thread, dep_libdrm, dep_m, dep_dl],
   soversion : host_machine.system() == 'windows' ? '' : '1',
   version : '1.1.0',
+  darwin_versions  : '3.0.0',
   name_prefix : 'lib',
   install : true,
 )

src/mapi/es2api/meson.build

@@ -49,6 +49,7 @@ libgles2 = shared_library(
   dependencies : [dep_thread, dep_libdrm, dep_m, dep_dl],
   soversion : host_machine.system() == 'windows' ? '' : '2',
   version : '2.0.0',
+  darwin_versions : '3.0.0',
   name_prefix : 'lib',
   install : true,
 )