Revert "librustc: Make unqualified identifier searches terminate at the nearest module scope. r=tjc"

This reverts commit a8d37af2473da79be704c9ce2374f278c47177b6.
Only ignore failing bigint tests on 32-bit platforms
Update libuv for Android
Support ARM and Android

Conflicts:
	src/libcore/os.rs
	src/librustc/back/link.rs
	src/librustc/driver/driver.rs
	src/librustc/metadata/loader.rs
	src/librustc/middle/trans/base.rs
More android support
Conflicts:
	Makefile.in
	cmakeFiles/rustllvm.cmake