Merge branch 'physalloc3-fix' into 'master'

Add missing match item for `PartialAllocStrategy::Greedy`.

See merge request redox-os/syscall!48

src/flag.rs

@@ -174,6 +174,7 @@ impl PartialAllocStrategy {
         match raw {
             0x0001_0000 => Some(Self::Optimal),
             0x0002_0000 => Some(Self::GreatestRange),
+            0x0003_0000 => Some(Self::Greedy),
             _ => None,
         }
     }