fixed slow_test and api_test for out-of-band builds ref EOSIO/eos#379

tests/CMakeLists.txt

@@ -14,12 +14,12 @@ if(WASM_TOOLCHAIN)
   file(GLOB SLOW_TESTS "slow_tests/*.cpp")
   add_executable( slow_test ${SLOW_TESTS} ${COMMON_SOURCES} )
   target_link_libraries( slow_test eos_native_contract eos_chain chainbase eos_utilities eos_egenesis_none fc ${PLATFORM_SPECIFIC_LIBS} )
-  target_include_directories( slow_test PUBLIC ${CMAKE_SOURCE_DIR}/contracts )
+  target_include_directories( slow_test PUBLIC ${CMAKE_BINARY_DIR}/contracts )
   add_dependencies(slow_test currency exchange)
 
   file(GLOB API_TESTS "api_tests/*.cpp")
   add_executable( api_test ${API_TESTS} ${COMMON_SOURCES} )
   target_link_libraries( api_test eos_native_contract eos_chain chainbase eos_utilities eos_egenesis_none fc ${PLATFORM_SPECIFIC_LIBS} )
-  target_include_directories( api_test PUBLIC ${CMAKE_SOURCE_DIR}/contracts )
+  target_include_directories( api_test PUBLIC ${CMAKE_BINARY_DIR}/contracts ${CMAKE_SOURCE_DIR}/contracts )
   add_dependencies(api_test test_api)
 endif()
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