cmake: generate clar.suite in binary directory

Change the output path of generate.py to generate the clar.suite file
inside of the binary directory. This fixes out of tree builds with
read-only source trees as we now refrain from writing anything into the
source tree.

CMakeLists.txt

@@ -676,15 +676,16 @@ IF (BUILD_CLAR)
 	SET(SRC_CLAR "${CLAR_PATH}/main.c" "${CLAR_PATH}/clar_libgit2.c" "${CLAR_PATH}/clar_libgit2_trace.c" "${CLAR_PATH}/clar_libgit2_timer.c" "${CLAR_PATH}/clar.c")
 
 	ADD_CUSTOM_COMMAND(
-		OUTPUT ${CLAR_PATH}/clar.suite
-		COMMAND ${PYTHON_EXECUTABLE} generate.py -f -xonline -xstress .
+		OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/clar.suite
+		COMMAND ${PYTHON_EXECUTABLE} generate.py -o "${CMAKE_CURRENT_BINARY_DIR}" -f -xonline -xstress .
 		DEPENDS ${SRC_TEST}
 		WORKING_DIRECTORY ${CLAR_PATH}
 	)
+	INCLUDE_DIRECTORIES(${CMAKE_CURRENT_BINARY_DIR})
 
 	SET_SOURCE_FILES_PROPERTIES(
 		${CLAR_PATH}/clar.c
-		PROPERTIES OBJECT_DEPENDS ${CLAR_PATH}/clar.suite)
+		PROPERTIES OBJECT_DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/clar.suite)
 
 	ADD_EXECUTABLE(libgit2_clar ${SRC_H} ${SRC_GIT2} ${SRC_OS} ${SRC_CLAR} ${SRC_TEST} ${SRC_ZLIB} ${SRC_HTTP} ${SRC_REGEX} ${SRC_SSH} ${SRC_SHA1})