Enables scripts to work where perl is not installed at /usr/bin/perl
- Issue an error when --build is used together with --make - When given --build, always use GNU Make to perform the build - Update documentation (examples were good as they were) - Remove the broken t_flag_build_cmake test Fixes #2280
* Add --build, -j, -MAKEFLAGS, and --no-verilate options * Verilator: Can build on both gmake and cmake
