host_os.ya.make.inc support

build/platform/test_tool/ya.make

@@ -10,7 +10,13 @@ ENDIF()
 IF (TEST_TOOL3_HOST_LOCAL)
     MESSAGE(WARNING Host test tool3 $TEST_TOOL3_HOST_LOCAL will be used)
 ENDIF()
-INCLUDE(host.ya.make.inc)
+
+IF (OPENSOURCE AND USE_OPENSOURCE_TEST_TOOL)
+    INCLUDE(host_os.ya.make.inc)
+ELSE()
+    INCLUDE(host.ya.make.inc)
+ENDIF()
+
 IF (TEST_TOOL_TARGET_LOCAL)
     MESSAGE(WARNING Target test tool $TEST_TOOL_TARGET_LOCAL will be used)
 ENDIF()