sync tests with the latest format fixes

Author: weltling

ext/session/tests/session_encode_error2.phpt

@@ -121,7 +121,7 @@ bool(true)
 -- Iteration 4 --
 bool(true)
 
-Notice: session_encode(): Skipping numeric key -2345 in %s on line %d
+Notice: session_encode(): Skipping numeric key 18446744073709549271 in %s on line %d
 bool(false)
 bool(true)
 
@@ -135,7 +135,7 @@ bool(true)
 -- Iteration 6 --
 bool(true)
 
-Notice: session_encode(): Skipping numeric key -10 in %s on line %d
+Notice: session_encode(): Skipping numeric key 18446744073709551606 in %s on line %d
 bool(false)
 bool(true)
 

ext/session/tests/session_encode_variation6.phpt

@@ -45,7 +45,7 @@ bool(false)
 bool(true)
 bool(true)
 
-Notice: session_encode(): Skipping numeric key -1234567890 in %s on line %d
+Notice: session_encode(): Skipping numeric key 18446744072474983726 in %s on line %d
 bool(false)
 bool(true)
 Done