make 32bit ignore more accurate

tests/codegen/issues/issue-37945.rs

@@ -1,9 +1,5 @@
 // compile-flags: -O -Zmerge-functions=disabled
-// ignore-x86
-// ignore-arm
-// ignore-emscripten
-// ignore-gnux32
-// ignore 32-bit platforms (LLVM has a bug with them)
+// ignore-32bit LLVM has a bug with them
 // ignore-debug
 
 // Check that LLVM understands that `Iter` pointer is not null. Issue #37945.

tests/run-make/static-pie/Makefile

@@ -2,7 +2,7 @@ include ../tools.mk
 
 # only-x86_64
 # only-linux
-# ignore-gnux32
+# ignore-32bit
 
 # How to manually run this
 # $ ./x.py test --target x86_64-unknown-linux-[musl,gnu] tests/run-make/static-pie