preprocessor_test.cpp is compile only test

[SVN r11892]

status/regression.cfg

@@ -37,7 +37,7 @@ run libs/math/octonion/octonion_test.cpp
 run libs/math/quaternion/quaternion_test.cpp
 run libs/math/special_functions/special_functions_test.cpp
 run libs/pool/test/test_pool_alloc.cpp
-run libs/preprocessor/test/preprocessor_test.cpp
+compile libs/preprocessor/test/preprocessor_test.cpp
 run libs/rational/rational_example.cpp
 run libs/rational/rational_test.cpp
 run libs/random/random_test.cpp