Copy description from Cargo.toml to METADATA am: 7ca0635669 am: 0c11f4367b

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/rustc-hash/+/1456779

Change-Id: Ibeeac47a8678478c28e1d0d1cd7bf0ed148974d0
diff --git a/METADATA b/METADATA
index 856b409..6f1612e 100644
--- a/METADATA
+++ b/METADATA
@@ -1,5 +1,5 @@
 name: "rustc-hash"
-description: "A speedy hash algorithm used within rustc. The hashmap in liballoc by default uses SipHash which isn\'t quite as speedy as we want. In the compiler we\'re not really worried about DOS attempts, so we use a fast non-cryptographic hash."
+description: "speed, non-cryptographic hash used in rustc"
 third_party {
   url {
     type: HOMEPAGE