Fix test_dlopen_linker_script_input_linux being omitted on Fedora 40 …

…aarch64 (#161)

I found working on Fedora 40 on aarch64 that
`test_dlopen_linker_script_input_linux` was omitted due to not finding
libncurses.so, since it is in /usr/lib64. This PR makes the glob a
little more portable.

test/fiddle/test_fiddle.rb

@@ -27,7 +27,7 @@ def test_windows_constant
 
   def test_dlopen_linker_script_input_linux
     omit("This is only for Linux") unless RUBY_PLATFORM.match?("linux")
-    if Dir.glob("/usr/lib/*/libncurses.so").empty?
+    if Dir.glob("/usr/lib{64}/**/libncurses.so").empty?
       omit("libncurses.so is needed")
     end
     if ffi_backend?