Enable ARM and THUMB AOT support, enable Android platform support (#182)

* Sync with internal/feature: enable arm aot and android platform

core/shared/platform/alios/bh_platform.c

@@ -45,3 +45,7 @@ bh_mprotect(void *addr, uint32 size, int prot)
     return 0;
 }
 
+void
+bh_dcache_flush()
+{
+}

core/shared/platform/alios/bh_platform.h

@@ -130,6 +130,7 @@ enum {
 void *bh_mmap(void *hint, unsigned int size, int prot, int flags);
 void bh_munmap(void *addr, uint32 size);
 int bh_mprotect(void *addr, uint32 size, int prot);
+void bh_dcache_flush();
 
 #endif /* end of _BH_PLATFORM_H */