remove --show-details from lcov's genhtml, as currently we don't sepa…

…rate the coverage data per test, making this option useless

# gathering per test coverage data is possible, but way too slow and would require modifications to run-tests.php

Makefile.gcov

@@ -67,7 +67,7 @@ php_lcov.info: lcov-test
 
 lcov-html: php_lcov.info
 	@echo "Generating lcov HTML"
-	@$(LTP_GENHTML) --legend --output-directory lcov_html/ --title "PHP Code Coverage" --show-details php_lcov.info
+	@$(LTP_GENHTML) --legend --output-directory lcov_html/ --title "PHP Code Coverage" php_lcov.info
 
 lcov-clean:
 	rm -f php_lcov.info