Transceiver52M: Add NEON complex-complex multiply

Complex-complex block multiples are used for phase rotation of
bursts. Optimization targeted from perf profiling.

Signed-off-by: Thomas Tsou <tom@tsou.cc>
diff --git a/Transceiver52M/Makefile.am b/Transceiver52M/Makefile.am
index 981447f..735265f 100644
--- a/Transceiver52M/Makefile.am
+++ b/Transceiver52M/Makefile.am
@@ -77,7 +77,8 @@
 	Resampler.h \
 	common/convolve.h \
 	common/convert.h \
-	common/scale.h
+	common/scale.h \
+	common/mult.h
 
 transceiver_SOURCES = runTransceiver.cpp
 transceiver_LDADD = \