setjmp: Only use _setjmp3 on i386

Don't use _WIN64 to decide this, but check explicitly for i386,
and use _setjmp on other platforms.

This fixes compilation of code using setjmp on arm32.

Signed-off-by: Martin Storsjö <martin@martin.st>

mingw-w64-headers/crt/setjmp.h

diff --git a/mingw-w64-headers/crt/setjmp.h b/mingw-w64-headers/crt/setjmp.h
index c931c77..dcda667 100644
--- a/mingw-w64-headers/crt/setjmp.h
+++ b/mingw-w64-headers/crt/setjmp.h
@@ -178,14 +178,14 @@
 
 #ifndef USE_NO_MINGW_SETJMP_TWO_ARGS
 #  ifndef _INC_SETJMPEX
-#    ifdef _WIN64
+#    if defined(_X86_) || defined(__i386__)
+#      define setjmp(BUF) _setjmp3((BUF), NULL)
+#    else
 #     if (__MINGW_GCC_VERSION < 40702)
 #      define setjmp(BUF) _setjmp((BUF), mingw_getsp())
 #     else
 #      define setjmp(BUF) _setjmp((BUF), __builtin_frame_address (0))
 #     endif
-#    else
-#      define setjmp(BUF) _setjmp3((BUF), NULL)
 #    endif
   int __cdecl __attribute__ ((__nothrow__,__returns_twice__)) _setjmp(jmp_buf _Buf, void *_Ctx);
   int __cdecl __attribute__ ((__nothrow__,__returns_twice__)) _setjmp3(jmp_buf _Buf, void *_Ctx);