Disable rpath in cross compiled C extensions

This instructs cross rubies to omit the rpath linker option to the absolute path in the build environment, which is like

```
-Wl,-rpath,/home/kanis/.rvm/rubies/ruby-3.4.5/lib
```

This path is not present on the target system and could lead to security issues.

Related to sparklemotion/nokogiri#3133

Author: larskanis

build/patches/rake-compiler-1.2.9/0004-Enable-build-of-static-libruby.patch

@@ -2,13 +2,14 @@ diff --git a/tasks/bin/cross-ruby.rake b/tasks/bin/cross-ruby.rake
 index 8317a2a3..8ed21718 100644
 --- a/tasks/bin/cross-ruby.rake
 +++ b/tasks/bin/cross-ruby.rake
-@@ -116,11 +116,31 @@
+@@ -116,11 +116,32 @@
          "--host=#{mingw_host}",
          "--target=#{mingw_target}",
          "--build=#{RUBY_BUILD}",
 -        '--enable-shared',
 +        '--enable-install-static-library',
 +        '--disable-jit-support',
++        '--disable-rpath',
 +        'ac_cv_lib_z_uncompress=no',
 +        'ac_cv_lib_crypt_crypt=no',
 +        'ac_cv_func_crypt_r=no',