sdk/rust: Move profile settings to workspace

sdk/rust/Cargo.toml

@@ -3,3 +3,7 @@ members = [
   "core",
   "sdk"
 ]
+
+[profile.release]
+opt-level = 3
+lto = "thin"

sdk/rust/core/Cargo.toml

@@ -6,12 +6,6 @@ edition = "2018"
 
 [features]
 
-
-[profile.release]
-opt-level = 3
-lto       = "thin"
-
-
 [dependencies]
 byteorder       = "*"
 hex             = "*"