Support building on Android arm aarch64 x86 x86_64

1. Add cmake support in CMakeLists.txt according to https://developer.android.com/ndk/guides/other_build_systems

2. Resolve symbols errors

3. Backport fixes from 438ed42311

   > QEMU relies on two optimization for ppc64 and arm:
   >
   > 1. if(0) /* optimized code */
   > 2. assert(0); /* optimized code */
   >
   > But the assert on mingw32 doesn't have noreturn attribute which prevents
   > the second optimization and some code is reverted to the original code
   > to fit in the first optimization.
   >
   > The assert implementation is copied from glib as qemu did.

   Unfortunately, NDK also doesn't have an assert implementation qemu prefers.

qemu/target/ppc/mmu-hash64.c

@@ -1172,7 +1172,9 @@ void ppc_hash64_init(PowerPCCPU *cpu)
     PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);
 
     if (!pcc->hash64_opts) {
+#ifndef NDEBUG
         assert(!(env->mmu_model & POWERPC_MMU_64));
+#endif
         return;
     }