Fix(run_synthesis.sh): fail if any command fails

[Xelef2000]

Problem

run_yosys() {
    run_cmd "echo [INFO][Yosys] Synthesizing ${TOP_DESIGN}"
    run_cmd "yosys \
        -c scripts/yosys_synthesis.tcl 2>&1 | \
        TZ=UTC gawk '{ print strftime(\"[%Y-%m-%d %H:%M %Z]\"), \$0 }' | \
        tee ${PROJ_NAME}.log | \
        gawk -f scripts/filter_output.awk"
}

If yosys synthesis fails, the bash only passes on the exit command of the last command in the pipe chain, in this case, the result of the gawk command.
This means that even if yosys fails, the script will still exit with a return value of 0, which is unhelpful when it is invoked by another script/tool.

Solution
Set set -o pipefail, which means that the script will return the exit status of the rightmost command that failed, or 0 if none failed.