Update code coverage testing documentation

README.md

@@ -115,24 +115,18 @@ serialization_tests  // Tests related of serialization
 Code Coverage Testing
 ---------------------
 
+If you have not done so, install lcov `brew install lcov`
+
 ```
-cmake -D ENABLE_COVERAGE_TESTING=true -D CMAKE_BUILD_TYPE=Debug .
+cmake -D BUILD_STEEM_TESTNET=ON -D ENABLE_COVERAGE_TESTING=true -D CMAKE_BUILD_TYPE=Debug .
 make
 lcov --capture --initial --directory . --output-file base.info --no-external
-libraries/fc/bloom_test
-libraries/fc/task_cancel_test
-libraries/fc/api
-libraries/fc/blind
-libraries/fc/ecc_test test
-libraries/fc/real128_test
-libraries/fc/lzma_test README.md
-libraries/fc/ntp_test
 tests/chain_test
 lcov --capture --directory . --output-file test.info --no-external
 lcov --add-tracefile base.info --add-tracefile test.info --output-file total.info
-lcov -o interesting.info -r total.info libraries/fc/vendor/\* libraries/fc/tests/\* tests/\*
+lcov -o interesting.info -r total.info tests/\*
 mkdir -p lcov
 genhtml interesting.info --output-directory lcov --prefix `pwd`
 ```
 
-Now open `locv/index.html` in a browser
+Now open `lcov/index.html` in a browser