Android: Silence unused function parameter warnings

Numbers of hs20-osu-client functions do not use all of the parameters
currently. This makes the compiler output difficult to read due to
undesired warning messages. Get rid of those specific warnings for now.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>

hs20/client/Android.mk

@@ -68,6 +68,8 @@ L_CFLAGS += -DEAP_TLS_OPENSSL
 #CFLAGS += $(shell xml2-config --cflags)
 #LIBS += $(shell xml2-config --libs)
 
+L_CFLAGS += -Wno-unused-parameter
+
 
 ########################
 include $(CLEAR_VARS)