build: avoid panicing build script if target does split to >2 elements
build: avoid panicing build script if target does split to >2 elements

DenisKolodin/winapi-rs,docbrown/winapi-rs,DoumanAsh/winapi-rs,ROki1988/winapi-rs,Boddlnagg/winapi-rs,overdrivenpotato/winapi-rs,jmesmon/winapi-rs,Osspial/winapi-rs,tomaka/winapi-rs,bungcip/winapi-rs,gentoo90/winapi-rs,Connorcpu/winapi-rs