More fixes for the Solaris/x86 build. Thanks to Will Metcalf.

src/lj_def.h

@@ -118,8 +118,10 @@ typedef uintptr_t BloomFilter;
 #define LJ_NOINLINE	__attribute__((noinline))
 
 #if defined(__ELF__) || defined(__MACH__)
+#if !((defined(__sun__) && defined(__svr4__)) || defined(__solaris__))
 #define LJ_NOAPI	extern __attribute__((visibility("hidden")))
 #endif
+#endif
 
 /* Note: it's only beneficial to use fastcall on x86 and then only for up to
 ** two non-FP args. The amalgamated compile covers all LJ_FUNC cases. Only