fixed some expected error messages in the ngx.re test cases for Lua implementations of the ngx_lua API like lua-resty-core.

t/034-match.t

@@ -386,8 +386,8 @@ error: pcre_compile() failed: missing ) in "(abc"
     }
 --- request
     GET /re
---- response_body
-error: bad argument #3 to '?' (unknown flag "H")
+--- response_body_like chop
+error: .*?unknown flag "H"
 
 
 

t/038-match-o.t

@@ -362,8 +362,8 @@ error: pcre_compile() failed: missing ) in "(abc"
     }
 --- request
     GET /re
---- response_body
-error: bad argument #3 to '?' (unknown flag "H")
+--- response_body_like chop
+^error: .*?unknown flag "H"