Since DETECT_DEADLOCKS is now split from DEBUG_THREADS, it must
always be included in buildopts.h instead of only when
ADD_CFLAGS_TO_BUILDOPTS_H is defined. A SEGV will result otherwise.
Resolves: #719
(cherry picked from commit
d1d80af0c0e26a4c4aa95578c2d88c35901c587d)
FILTER_OUT="\
AO2_DEBUG|BETTER_BACKTRACES|BUILD_NATIVE|\
COMPILE_DOUBLE|DEBUG_CHAOS|DEBUG_SCHEDULER|\
-DETECT_DEADLOCKS|DONT_OPTIMIZE|DUMP_SCHEDULER|\
+DONT_OPTIMIZE|DUMP_SCHEDULER|\
LOTS_OF_SPANS|MALLOC_DEBUG|RADIO_RELAX|\
REBUILD_PARSERS|REF_DEBUG|USE_HOARD_ALLOCATOR"