make/lib/Lib-java.desktop.gmk

8201357: ALSA_CFLAGS is needed; was dropped in JDK-8071469
Reviewed-by: ihse, asmundak

@@ -48,10 +48,11 @@
       $(TOPDIR)/src/java.desktop/$(OPENJDK_TARGET_OS)/native/libjsound \
       )
 
   LIBJSOUND_CFLAGS := \
       -I$(SUPPORT_OUTPUTDIR)/headers/java.desktop \
+      $(ALSA_CFLAGS) \
       $(LIBJAVA_HEADER_FLAGS) \
       $(foreach dir, $(LIBJSOUND_SRC_DIRS), -I$(dir)) \
       -DX_PLATFORM=X_$(OPENJDK_TARGET_OS_UPPERCASE) \
       -DUSE_PORTS=TRUE \
       -DUSE_DAUDIO=TRUE \