Bug 1265893 - Import tooltool rust 1.8 on linux32. r=mshal

This is the same repack of the upstream 1.8.0 stable build
for x86_64-unknown-linux-gnu hosts plus the i686 and
x86_64 std libraries used for the linux64 builds.

MozReview-Commit-ID: Gfd9YkNVe4K

browser/config/tooltool-manifests/linux32/releng.manifest

@@ -16,6 +16,14 @@
 "unpack": true
 },
 {
+"version": "rustc 1.8.0 (db2939409 2016-04-11)",
+"size": 123218320,
+"digest": "7afcd7b39c4d5277db6b28951602aff4c698102ba45d3d811b353ca7446074beceebf03a2a529e323af19d73db4acbe96ec2bdad44def2e218ed36f55e82cab2",
+"algorithm": "sha512",
+"filename": "rustc.tar.xz",
+"unpack": true
+},
+{
 "size": 167175,
 "digest": "0b71a936edf5bd70cf274aaa5d7abc8f77fe8e7b5593a208f805cc9436fac646b9c4f0b43c2b10de63ff3da671497d35536077ecbc72dba7f8159a38b580f831",
 "algorithm": "sha512",