Fix Mac and Windows builds.

Author: khuey

src/symbolize/gimli/coff.rs

@@ -1,4 +1,5 @@
-use super::{Context, Mapping, Path, Stash, Vec};
+use super::{gimli, Context, Endian, EndianSlice, Mapping, Path, Stash, Vec};
+use alloc::sync::Arc;
 use core::convert::TryFrom;
 use object::pe::{ImageDosHeader, ImageSymbol};
 use object::read::pe::{ImageNtHeaders, ImageOptionalHeader, SectionTable};

src/symbolize/gimli/macho.rs

@@ -1,4 +1,5 @@
-use super::{Box, Context, Mapping, Path, Stash, Vec};
+use super::{gimli, Box, Context, Endian, EndianSlice, Mapping, Path, Stash, Vec};
+use alloc::sync::Arc;
 use core::convert::TryInto;
 use object::macho;
 use object::read::macho::{MachHeader, Nlist, Section, Segment as _};