Use the size of the MACHINE_ARCH string instead of sizeof(uint32_t). It can

happen sizeof(MACHINE_ARCH) is more than 4 bytes, and bad things would
happen. This should make the ctors being called again on armeb.

lib/csu/arm/crt1.c

@@ -123,7 +123,7 @@ static const struct {
 	char	desc[sizeof(MACHINE_ARCH)];
 } archtag __attribute__ ((section (NOTE_SECTION), aligned(4))) __used = {
 	.namesz = sizeof(NOTE_FREEBSD_VENDOR),
-	.descsz = sizeof(int32_t),
+	.descsz = sizeof(MACHINE_ARCH),
 	.type = ARCH_NOTETYPE,
 	.name = NOTE_FREEBSD_VENDOR,
 	.desc = MACHINE_ARCH