Add aarch64-linux native package

.gitignore

@@ -1,19 +0,0 @@
-# ---> Racket
-# gitignore template for the Racket language
-# website: http://www.racket-lang.org/
-
-# DrRacket autosave files
-*.rkt~
-*.rkt.bak
-\#*.rkt#
-\#*.rkt#*#
-
-# Compiled racket bytecode
-compiled/
-*.zo
-
-# Dependency tracking files
-*.dep
-
-*.bak
-

Makefile.rkt

@@ -1,38 +0,0 @@
-#lang racket-makefile
-
-(require package-zipper
-         git
-         )
-
-
-(target all
-        (displayln "use (make clean) or (make package)")
-        )
-
-(target clean
-        (for-each (λ (f) (displayln f) (rm-f f)) (list-files "." #px"([.]bak|~)$" #:recursive #t))
-        (for-each (λ (d) (displayln d) (rm-rf d)) (list-dirs "." #px"(compiled|doc)$" #:recursive #t))
-        (when (directory-exists? "scribblings")
-          (for-each (λ (f) (displayln f) (rm-f f)) (list-files "scribblings" #px"[.](css|js|html)$")))
-        )
-
-(target package
-        (deps clean)
-        (zip-package))
-
-(target housekeeping
-        (displayln "Committing changes for:")
-        (let ((changes (git 'status)))
-          (when (> (length changes) 0)
-            (dgit 'status)
-            (displayln "Adding...")
-            (dgit 'add '-A)
-            (displayln "Committing...")
-            (dgit 'commit (git-prompt))
-            (displayln "Pushing...")
-            (dgit 'push)))
-        )
-
-(target main
-        (deps housekeeping)
-        (git 'switch "main"))

README.md

@@ -1,6 +1,6 @@
-# racket-audio-x86_64-linux
+# racket-audio-aarch64-linux
 
-Native libraries for `racket-audio` on Linux x86_64.
+Native libraries for `racket-audio` on Linux ARM64 / Raspberry Pi 64-bit.
 
 Put the native files directly in the root of this branch, next to `info.rkt`.
 
@@ -12,4 +12,4 @@ List every shipped native file in `copy-foreign-libs` in `info.rkt`.
 
 Racket Package Index source:
 
-    <git-url>#x86_64-linux
+    <git-url>#aarch64-linux

info.rkt

@@ -5,7 +5,7 @@
 (define version "0.1.0")
 
 (define pkg-desc
-  "native libraries for \"racket-audio\" on \"x86_64-linux\"")
+  "native libraries for \"racket-audio\" on \"aarch64-linux\"")
 
 (define pkg-authors
   '(hans))
@@ -14,7 +14,7 @@
   '(Apache-2.0 OR MIT))
 
 (define install-platform
-  "x86_64-linux")
+  "aarch64-linux")
 
 ;; Add every native library shipped in this branch, including runtime
 ;; dependencies required by the primary audio libraries.
@@ -23,4 +23,3 @@
 
 (define deps
   '("base"))
-