rubyopt_spec.rb: skip -v in RUBYOPT examples

* spec/ruby/command_line/rubyopt_spec.rb: skip -v in RUBYOPT
  examples when CROSS_COMPILING is set by fake.rb.  the version
  number by -v is printed before loading libraries by -r options,
  so setting RUBY_DESCRIPTION in fake.rb has no effect.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63833 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

spec/ruby/command_line/rubyopt_spec.rb

@@ -22,14 +22,16 @@ describe "Processing RUBYOPT" do
     result.should =~ /value of \$DEBUG is true/
   end
 
-  it "prints the version number for '-v'" do
-    ENV["RUBYOPT"] = '-v'
-    ruby_exe("")[/\A.*/].should == RUBY_DESCRIPTION
-  end
+  unless CROSS_COMPILING
+    it "prints the version number for '-v'" do
+      ENV["RUBYOPT"] = '-v'
+      ruby_exe("")[/\A.*/].should == RUBY_DESCRIPTION
+    end
 
-  it "ignores whitespace around the option" do
-    ENV["RUBYOPT"] = ' -v '
-    ruby_exe("")[/\A.*/].should == RUBY_DESCRIPTION
+    it "ignores whitespace around the option" do
+      ENV["RUBYOPT"] = ' -v '
+      ruby_exe("")[/\A.*/].should == RUBY_DESCRIPTION
+    end
   end
 
   it "sets $VERBOSE to true for '-w'" do