tests: skip filelog damage tests when not using revlogs

Differential Revision: https://phab.mercurial-scm.org/D3042

tests/test-push.t

@@ -173,6 +173,8 b' Test server side validation during push'
   updating to branch default
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
+#if reporevlogstore
+
 Test spurious filelog entries:
 
   $ cd test-validation-clone
@@ -246,6 +248,8 b' Expected to fail:'
 
   $ cd ..
 
+#endif
+
 Test push hook locking
 =====================