Add ignore-emscripten too

Author: scottmcm

src/test/mir-opt/lower_128bit_debug_test.rs

@@ -11,6 +11,7 @@
 // asmjs can't even pass i128 as arguments or return values, so ignore it.
 // this will hopefully be fixed by the LLVM 5 upgrade (#43370)
 // ignore-asmjs
+// ignore-emscripten
 
 // compile-flags: -Z lower_128bit_ops -C debug_assertions=yes
 

src/test/mir-opt/lower_128bit_test.rs

@@ -11,6 +11,7 @@
 // asmjs can't even pass i128 as arguments or return values, so ignore it.
 // this will hopefully be fixed by the LLVM 5 upgrade (#43370)
 // ignore-asmjs
+// ignore-emscripten
 
 // compile-flags: -Z lower_128bit_ops -C debug_assertions=no