Using qbe fork

Update release and selfhost build scripts to use my qbe fork, which
updates the technique for swapping two registers on aarch64 to avoid the
use of the `x18` register, which had introduced UB due to it being a
reserved platform register.

.github/workflows/release.yml

@@ -31,7 +31,7 @@ jobs:
         uses: actions/checkout@v4
       - name: Install QBE
         run: |
-          git clone https://github.com/kengorab/qbe-mirror
+          git clone -b fork --single-branch https://github.com/kengorab/qbe-mirror
           mv qbe-mirror qbe
           cd qbe
           make

.github/workflows/selfhost.yml

@@ -14,7 +14,7 @@ jobs:
       uses: actions/checkout@v2
     - name: Install QBE
       run: |
-        git clone https://github.com/kengorab/qbe-mirror
+        git clone -b fork --single-branch https://github.com/kengorab/qbe-mirror
         mv qbe-mirror qbe
         cd qbe
         make

projects/compiler/example.abra

@@ -1,14 +1 @@
-// val str: String? = None
-
-// println(str?.isEmpty())
-
-// println("a s d f".split(by: " "))
-// println("asdf".split())
-
-val arr = [1, 2, 3, 4]
-
-/// Expect: [1, 2, 2, 3, 3, 3, 4, 4, 4, 4]
-val arr2 = arr.flatMap(i => Array.fill(i, i))
-println(arr2)
-println(arr2.length)
-println(arr2)
+println(1)