Merge pull request #3155 from apple/compnerd/discovery-timeout

Update CMakeLists.txt

Author: compnerd

Tests/Foundation/CMakeLists.txt

@@ -184,6 +184,8 @@ xctest_discover_tests(TestFoundation
                         ${CMAKE_BINARY_DIR}/TestFoundation.app/TestFoundation${CMAKE_EXECUTABLE_SUFFIX}
                       WORKING_DIRECTORY
                         ${CMAKE_BINARY_DIR}/TestFoundation.app
+                      DISCOVERY_TIMEOUT
+                        10
                       PROPERTIES
                         ENVIRONMENT
                           LD_LIBRARY_PATH=${CMAKE_BINARY_DIR}/TestFoundation.app:$<TARGET_LINKER_FILE_DIR:XCTest>:$<TARGET_LINKER_FILE_DIR:dispatch>:$<TARGET_LINKER_FILE_DIR:swiftDispatch>:$<TARGET_LINKER_FILE_DIR:BlocksRuntime>)