Add RP2040 and STM32 support to build.sh#1603

oltaco wants to merge 2 commits intomeshcore-dev:devmeshcore-dev/MeshCore:devfrom

oltaco:fix-build.sh-for-RP2040-and-STM32oltaco/MeshCore:fix-build.sh-for-RP2040-and-STM32Copy head branch name to clipboard