Moving tests/refcount/ directory to gobject/tests/

Modified by Philip Withnall to omit the subdirectory and drop the
`refcount` suite as both seem like unnecessary over-categorisation.

Related to issue #1434

gobject/tests/meson.build

@@ -57,6 +57,28 @@ gobject_tests = {
   'signalgroup' : {},
   'testing' : {},
   'type-flags' : {},
+  'objects-refcount1' : {},
+  'objects-refcount2' : {'suite' : ['slow']},
+  'properties-refcount1' : {},
+  'properties-refcount2' : {'suite' : ['slow']},
+  'properties-refcount3' : {'suite' : ['slow']},
+  'properties-refcount4' : {},
+  'signals-refcount1' : {
+    'source' : 'signals-refcount.c',
+    'c_args' : ['-DTESTNUM=1'],
+  },
+  'signals-refcount2' : {
+    'source' : 'signals-refcount.c',
+    'c_args' : ['-DTESTNUM=2'],
+  },
+  'signals-refcount3' : {
+    'source' : 'signals-refcount.c',
+    'c_args' : ['-DTESTNUM=3'],
+  },
+  'signals-refcount4' : {
+    'source' : 'signals-refcount.c',
+    'c_args' : ['-DTESTNUM=4'],
+  },
 }
 
 if cc.get_id() != 'msvc'