gnu: rust-tokio-1: Update to 1.15.0.

* gnu/packages/crates-io.scm (rust-tokio-1): Update to 1.15.0.
(rust-tokio-1.8): Inherit from above.

gnu/packages/crates-io.scm

@@ -57525,8 +57525,45 @@ to a style defined by John Gruber for post titles on his website ``Daring
 Fireball''.")
     (license license:expat)))
 
+(define-public rust-tokio-1
+  (package
+    (name "rust-tokio")
+    (version "1.15.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (crate-uri "tokio" version))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32
+         "0f2qwp9ljc4gf955g7qcksp0jc1bwmzxb2nf6mb7h1n2irvirgzv"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:skip-build? #t
+       #:cargo-inputs
+       (("rust-autocfg" ,rust-autocfg-1)
+        ("rust-bytes" ,rust-bytes-1)
+        ("rust-libc" ,rust-libc-0.2)
+        ("rust-memchr" ,rust-memchr-2)
+        ("rust-mio" ,rust-mio-0.7)
+        ("rust-num-cpus" ,rust-num-cpus-1)
+        ("rust-once-cell" ,rust-once-cell-1)
+        ("rust-parking-lot" ,rust-parking-lot-0.11)
+        ("rust-pin-project-lite" ,rust-pin-project-lite-0.2)
+        ("rust-signal-hook-registry" ,rust-signal-hook-registry-1)
+        ("rust-tokio-macros" ,rust-tokio-macros-1)
+        ("rust-tracing" ,rust-tracing-0.1)
+        ("rust-winapi" ,rust-winapi-0.3))))
+    (home-page "https://tokio.rs")
+    (synopsis "Event-driven, non-blocking I/O platform")
+    (description
+     "This package provides an event-driven, non-blocking I/O platform for
+writing asynchronous I/O backed applications.")
+    (license license:expat)))
+
 (define-public rust-tokio-1.8
   (package
+    (inherit rust-tokio-1)
     (name "rust-tokio")
     (version "1.8.0")
     (source
@@ -57537,7 +57574,6 @@ Fireball''.")
        (sha256
         (base32
          "1m18rs51wz6s7dwdwzr0j63kh815x4dx9k0f2c485crs7fqjw32p"))))
-    (build-system cargo-build-system)
     (arguments
      `(#:skip-build? #t
        #:cargo-inputs
@@ -57561,43 +57597,7 @@ Fireball''.")
         ("rust-proptest" ,rust-proptest-1)
         ("rust-sokcet2-0.4" ,rust-socket2-0.4)
         ("rust-tokio-stream" ,rust-tokio-stream-0.1)
-        ("rust-tokio-test" ,rust-tokio-test-0.4))))
+        ("rust-tokio-test" ,rust-tokio-test-0.4))))))
-    (home-page "https://tokio.rs")
-    (synopsis "Event-driven, non-blocking I/O platform")
-    (description
-     "This package provides an event-driven, non-blocking I/O platform for
-writing asynchronous I/O backed applications.")
-    (license license:expat)))
-
-(define-public rust-tokio-1
-  (package
-    (inherit rust-tokio-1.8)
-    (name "rust-tokio")
-    (version "1.2.0")
-    (source
-     (origin
-       (method url-fetch)
-       (uri (crate-uri "tokio" version))
-       (file-name (string-append name "-" version ".tar.gz"))
-       (sha256
-        (base32
-         "0fmfykdp29hjq5264mp6sa4c0wp5mlimbi0dd9mrxsk5qq20s6g8"))))
-    (arguments
-     `(#:skip-build? #t
-       #:cargo-inputs
-       (("rust-autocfg" ,rust-autocfg-1)
-        ("rust-bytes" ,rust-bytes-1)
-        ("rust-libc" ,rust-libc-0.2)
-        ("rust-memchr" ,rust-memchr-2)
-        ("rust-mio" ,rust-mio-0.7)
-        ("rust-num-cpus" ,rust-num-cpus-1)
-        ("rust-once-cell" ,rust-once-cell-1)
-        ("rust-parking-lot" ,rust-parking-lot-0.11)
-        ("rust-pin-project-lite" ,rust-pin-project-lite-0.2)
-        ("rust-signal-hook-registry" ,rust-signal-hook-registry-1)
-        ("rust-tokio-macros" ,rust-tokio-macros-1)
-        ("rust-tracing" ,rust-tracing-0.1)
-        ("rust-winapi" ,rust-winapi-0.3))))))
 
 (define-public rust-tokio-0.3
   (package