use newer version of zstd and lzma

Cargo.lock

@@ -1871,9 +1871,9 @@ dependencies = [
 
 [[package]]
 name = "lzma-sys"
-version = "0.1.19"
+version = "0.1.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e06754c4acf47d49c727d5665ca9fb828851cda315ed3bd51edd148ef78a8772"
+checksum = "5fda04ab3764e6cde78b9974eec4f779acaba7c4e84b36eca3cf77c581b85d27"
 dependencies = [
  "cc",
  "libc",
@@ -4811,9 +4811,9 @@ dependencies = [
 
 [[package]]
 name = "zstd-sys"
-version = "2.0.1+zstd.1.5.2"
+version = "2.0.4+zstd.1.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9fd07cbbc53846d9145dbffdf6dd09a7a0aa52be46741825f5c97bdd4f73f12b"
+checksum = "4fa202f2ef00074143e219d15b62ffc317d17cc33909feac471c044087cad7b0"
 dependencies = [
  "cc",
  "libc",

maint/reproducible_build

@@ -44,12 +44,6 @@ export RUSTFLAGS="-C target-cpu=westmere"
 cp -a "$here" /arti
 cd /arti
 
-## use tmpfs to store dependencies sources. It has been observed that what
-## filesystem these files reside on has an impact on the resulting binary.
-## We put these in a tmpfs as a way to stabilize the result.
-mkdir -p /dev/shm/registry /usr/local/cargo/registry
-ln -s /dev/shm/registry /usr/local/cargo/registry/src
-
 cargo_build () {
 	$CARGO build --locked "$@"
 }