Build only the first arch for cts_audio_quality_test

We don't really need to build both arch in this case.

With BUILD_HOST_NATIVE_TEST, we build both 32 and 64 bit binaries and
the out/host/linux-x86/bin/cts_audio_quality_test will be a symlink to
cts_audio_quality_test64, without a real dependency on it.
The parent Android.mk would use a broken symlnk
out/host/linux-x86/bin/cts_audio_quality_test as dependency in that
case.

Change-Id: I92e072cf10a3ead03b62ae65a3cc2dd70dea8377
diff --git a/suite/audio_quality/test/Android.mk b/suite/audio_quality/test/Android.mk
index e37e6d1..ed0f4c9 100644
--- a/suite/audio_quality/test/Android.mk
+++ b/suite/audio_quality/test/Android.mk
@@ -38,5 +38,6 @@
 LOCAL_CFLAGS:= -g -fno-exceptions
 LOCAL_LDFLAGS:= -g -lrt -ldl -lm -fno-exceptions -lpthread
 LOCAL_MODULE_HOST_OS := linux
-LOCAL_MODULE:= cts_audio_quality_test
+LOCAL_MODULE := cts_audio_quality_test
+LOCAL_MULTILIB := first
 include $(BUILD_HOST_NATIVE_TEST)