test-profile: gate chg-incompatible part with '#if chg'

chg has a different extension loading logic, which affects the profiler
extension test case. Gate the block with '#if chg' so the test passes with
chg.

Differential Revision: https://phab.mercurial-scm.org/D916

tests/test-profile.t

@@ -111,6 +111,7 b' statprof can be used as a standalone mod'
 
   $ cd ..
 
+#if no-chg
 profiler extension could be loaded before other extensions
 
   $ cat > fooprof.py <<EOF
@@ -158,3 +159,4 b' profiler extension could be loaded befor'
   unrecognized profiler 'unknown' - ignored
 
   $ cd ..
+#endif