[lldb][test] TestExprLanguageNote.test: fix test on Windows

This still fails on Windows because the default language for the C++
frame is not the same as on Unix.

Also remove the LLD requirement, since we're not relying on DWARF here.

Author: Michael137

lldb/test/Shell/Expr/TestExprLanguageNote.test

@@ -1,5 +1,3 @@
-# REQUIRES: (system-windows && lld) || !system-windows
-
 # RUN: split-file %s %t
 # RUN: %clang_host -g %t/main.cpp -o %t.out
 #
@@ -29,7 +27,7 @@ run
 expr blah
 
 # CHECK-TARGET: (lldb) expr
-# CHECK-TARGET: note: Ran expression as 'C++{{.*}}'
+# CHECK-TARGET: note: Ran expression as '{{(ISO )?}}C++{{.*}}'
 
 expr -l objc -- blah