Loosen SEGV message testing

Since `rb_bug` does not always take Ruby frame info during SEGV, the
source file path may not be output.

```
  1) Failure:
TestRubyOptions#test_crash_report_script [/tmp/ruby/src/trunk_gcc11/test/ruby/test_rubyoptions.rb:907]:
Expected /
        bug\.rb:(?:1:)?\s\[BUG\]\sSegmentation\sfault.*\n
      /x
to match
  "[BUG] Segmentation fault at 0x000003e900328766\n"+
```
http://ci.rvm.jp/results/trunk_gcc11@ruby-sp2-noble-docker/5663880

Author: mame

test/ruby/test_rubyoptions.rb

@@ -789,7 +789,7 @@ module SEGVTest
 
     ExpectedStderrList = [
       %r(
-        -e:(?:1:)?\s\[BUG\]\sSegmentation\sfault.*\n
+        \[BUG\]\sSegmentation\sfault.*\n
       )x,
       %r(
         #{ Regexp.quote(RUBY_DESCRIPTION) }\n\n