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/tcg/arm/tcg-target.h

@@ -82,10 +82,8 @@ typedef enum {
 
 #define TCG_TARGET_NB_REGS 16
 
-#ifdef __ARM_ARCH_EXT_IDIV__
-#define use_idiv_instructions  1
-#else
-extern bool use_idiv_instructions;
+#ifndef __ARM_ARCH_EXT_IDIV__
+extern bool use_idiv_instructions;  // Unicorn: Don't have the same name with macro
 #endif
 
 
@@ -122,7 +120,11 @@ extern bool use_idiv_instructions;
 #define TCG_TARGET_HAS_muls2_i32        1
 #define TCG_TARGET_HAS_muluh_i32        0
 #define TCG_TARGET_HAS_mulsh_i32        0
+#ifdef __ARM_ARCH_EXT_IDIV__
+#define TCG_TARGET_HAS_div_i32          1
+#else
 #define TCG_TARGET_HAS_div_i32          use_idiv_instructions
+#endif
 #define TCG_TARGET_HAS_rem_i32          0
 #define TCG_TARGET_HAS_goto_ptr         1
 #define TCG_TARGET_HAS_direct_jump      0

qemu/tcg/arm/tcg-target.inc.c

@@ -27,7 +27,7 @@
 
 int arm_arch = __ARM_ARCH;
 
-#ifndef use_idiv_instructions
+#ifndef __ARM_ARCH_EXT_IDIV__
 bool use_idiv_instructions;
 #endif
 
@@ -2201,7 +2201,7 @@ static void tcg_target_init(TCGContext *s)
 {
     /* Only probe for the platform and capabilities if we havn't already
        determined maximum values at compile time.  */
-#ifndef use_idiv_instructions
+#ifndef __ARM_ARCH_EXT_IDIV__
     {
         unsigned long hwcap = qemu_getauxval(AT_HWCAP);
         use_idiv_instructions = (hwcap & HWCAP_ARM_IDIVA) != 0;