Exclude linker errors from compile test failure check

The MinGW linker hits the 65535 export ordinal limit when linking all
test bindings into one DLL. Filter out linker errors since the compile
test only validates that generated C++ code compiles cleanly.

Author: cfis

test/compile_rice_test.rb

@@ -25,7 +25,7 @@ def test_compile_bindings
       output, success = run_cmake("--build", "build/#{preset}")
       unless success
         # Link errors are expected (no implementations). Only fail on compile errors.
-        compile_errors = output.lines.select { |line| line =~ / error:/ || line =~ /error C\d{4}/ }
+        compile_errors = output.lines.select { |line| (line =~ / error:/ || line =~ /error C\d{4}/) && line !~ /ld\.exe|collect2|link\.exe|export ordinal/ }
         flunk "Compile errors:\n#{compile_errors.join}" unless compile_errors.empty?
       end
     end