Fix Android/x86 build.

src/lj_arch.h

@@ -395,7 +395,7 @@
 #endif
 
 /* Various workarounds for embedded operating systems. */
-#if defined(__ANDROID__) || defined(__symbian__)
+#if (defined(__ANDROID__) && !defined(LJ_TARGET_X86ORX64)) || defined(__symbian__)
 #define LUAJIT_NO_LOG2
 #endif
 #if defined(__symbian__)