Also disable on i686 for now

Author: CraftSpider

tests/tex-outputs.rs

@@ -201,7 +201,7 @@ fn file_encoding() {
 
 // Works around an issue where old (~2.7) Harfbuzz lays out glyphs differently.
 // Remove this once all external Harfbuzz versions don't exhibit the glyph-swapping behavior.
-#[cfg(not(feature = "external-harfbuzz"))]
+#[cfg(not(any(feature = "external-harfbuzz", target_arch = "x86")))]
 #[test]
 fn utf8_chars() {
     TestCase::new("utf8_chars")