Add Linux sdk items and fix toolchain downloader to really respect HostOS#2

Merged

jonpryor merged 3 commits intodotnet:masterfrom

atsushieno:fix-toolchain-downloader

Apr 20, 2016

Commits on Apr 20, 2016

Add Linux sdk items and fix toolchain downloader to really respect HostOS.
atsushieno
committed
HttpClient default timeout is 100sec. You can't really download NDK in 100sec.
atsushieno
committed
We cannot implicitly reference build item when the expression uses -> .
atsushieno
committed