IPACM: resolve the compile issue on 8952

posix_types.h file is not part of 8992 build
which causes compile issue, need add check

Change-Id: Iceb214de4b915fb4f232b0fef84b3322766b5bb6
diff --git a/ipacm/src/Android.mk b/ipacm/src/Android.mk
index d80be81..244653f 100644
--- a/ipacm/src/Android.mk
+++ b/ipacm/src/Android.mk
@@ -28,10 +28,10 @@
 LOCAL_CFLAGS += -DFEATURE_IPA_ANDROID
 LOCAL_CFLAGS += -DDEBUG
 
-ifeq ($(TARGET_ARCH),arm)
-LOCAL_CFLAGS += -include bionic/libc/kernel/arch-arm/asm/posix_types.h
-LOCAL_CFLAGS += -include bionic/libc/kernel/arch-arm/asm/byteorder.h
-endif
+filetoadd = bionic/libc/kernel/arch-arm/asm/posix_types.h
+LOCAL_CFLAGS += $(shell if [ -a $(filetoadd) ] ; then echo -include $(filetoadd) ; fi ;)
+filetoadd = bionic/libc/kernel/arch-arm/asm/byteorder.h
+LOCAL_CFLAGS += $(shell if [ -a $(filetoadd) ] ; then echo -include $(filetoadd) ; fi ;)
 
 LOCAL_SRC_FILES := IPACM_Main.cpp \
 		IPACM_EvtDispatcher.cpp \