test_reconfigure switched to b_coverage from b_lto

This is due to some compilers (e.g. lcc) don't support LTO,
and therefore no b_lto meson option is available.

run_unittests.py

@@ -2543,7 +2543,7 @@ endian = 'little'
 
     def test_reconfigure(self):
         testdir = os.path.join(self.unit_test_dir, '13 reconfigure')
-        self.init(testdir, ['-Db_lto=true'], default_args=False)
+        self.init(testdir, ['-Db_coverage=true'], default_args=False)
         self.build('reconfigure')
 
     def test_cross_file_system_paths(self):

test cases/unit/13 reconfigure/meson.build

@@ -1,5 +1,5 @@
 project('reconfigure test', ['c'])
 
-if get_option('b_lto') != true
-  error('b_lto not set')
+if get_option('b_coverage') != true
+  error('b_coverage not set')
 endif