v21.02.3
imagebuilder: fix broken image generation with external targets
ath79: Move TPLink WPA8630Pv2 to ath79-tiny target
sdk: unset BINARY_FOLDER and DOWNLOAD_FOLDER in final archives
target: fix copying of licenses for SDK/toolchain
build: define PWM_SUPPORT arch feature flag
build: make <subdir>/install opt-in, use it for target/ only