Unbreak SEPARATE_BUILD

--- tests/CMakeLists.txt.orig	Fri Jun 21 16:24:01 2013
+++ tests/CMakeLists.txt	Fri Jun 21 16:24:22 2013
@@ -1,4 +1,4 @@
-INCLUDE_DIRECTORIES(${CMAKE_CURRENT_SOURCE_DIR}/../include)
+INCLUDE_DIRECTORIES(${CMAKE_CURRENT_SOURCE_DIR}/../include ${CMAKE_CURRENT_BINARY_DIR}/../include)
 LINK_LIBRARIES(musicbrainz5 ${NEON_LIBRARIES})
 ADD_EXECUTABLE(mbtest mbtest.cc)
 ADD_EXECUTABLE(ctest ctest.c)
