Ignore errors to allow lcov 2.3 to work

contrib/coverage.bash

@@ -2,6 +2,7 @@
 set -e
 
 # Build RGBDS with gcov support
+
 make coverage -j
 
 # Run the tests
@@ -15,8 +16,8 @@ gcov src/**/*.cpp
 mkdir -p coverage
 
 # Generate coverage report
-lcov -c --no-external -d . -o coverage/coverage.info
-genhtml -f -s -o coverage/ coverage/coverage.info
+lcov -c --no-external -d . -o coverage/coverage.info --ignore-errors format,inconsistent,unsupported
+genhtml -f -s -o coverage/ coverage/coverage.info --ignore-errors category,corrupt,inconsistent
 
 # Open report in web browser
 if [ "$(uname)" == "Darwin" ]; then