gnu: Add go-github-com-twitchyliquid64-golang-asm.

* gnu/packages/golang-build.scm (go-github-com-twitchyliquid64-golang-asm): New variable.

Change-Id: I03f9113fd3d5bb1eb8941f64a719e652a19455cb

gnu/packages/golang-build.scm

@@ -363,6 +363,31 @@ simplifies development without sacrificing performance.")
 primitives in Go.")
     (license license:bsd-2)))
 
+(define-public go-github-com-twitchyliquid64-golang-asm
+  (package
+    (name "go-github-com-twitchyliquid64-golang-asm")
+    (version "0.15.1")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/twitchyliquid64/golang-asm")
+             (commit (string-append "v" version))))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32 "1akw41i0snxqw9lqzmnn4gx6hd5js5dr1vmfkm49wxans4k14vw4"))))
+    (build-system go-build-system)
+    (arguments
+     (list
+      #:import-path "github.com/twitchyliquid64/golang-asm"))
+    (home-page "https://github.com/twitchyliquid64/golang-asm")
+    (synopsis "Assembler from the Go compiler, in library form")
+    (description
+     "This package provides a mirror of the assembler from the Go compiler, with
+import paths re-written for the assembler to be functional as a standalone
+library.")
+    (license license:bsd-3)))
+
 (define-public go-github-com-yuin-goldmark
   (package
     (name "go-github-com-yuin-goldmark")