Prefer to use qualified type names in generated code.

Emit type names like ir::Foo instead of just Foo to avoid very long
manual use declarations in files including generated code.

lib/cretonne/src/legalizer/mod.rs

@@ -17,7 +17,6 @@ use cursor::{Cursor, FuncCursor};
 use dominator_tree::DominatorTree;
 use flowgraph::ControlFlowGraph;
 use ir;
-use ir::condcodes::IntCC;
 use isa::TargetIsa;
 use bitset::BitSet;