bootstrap.yml: Add repos for aarch64 and riscv64

bootstrap.yml

@@ -68,9 +68,20 @@ general:
     cargo:
         config_toml: 'extrafiles/config.toml'
 
+# Note: There are both "latest" and "rolling" repos for tools and packages.
+#       "latest" repos refer to the last entirely successful build on xbbs.
+#       "rolling" repos are updated by all (not necessary successful) builds. They are also reset
+#       on non-incremental builds on xbbs.
+#       We prefer "latest" repos here as we can expect that they are more stable.
 repositories:
-    tool_archives: 'https://builds.managarm.org/repos/tools/managarm/latest'
-    xbps: 'https://repos.managarm.org/repos/amd64/'
+    tool_archives:
+        x86_64: 'https://builds.managarm.org/repos/tools/managarm/latest'
+        aarch64: 'https://builds.managarm.org/repos/tools/managarm_aarch64/latest'
+        riscv64: 'https://builds.managarm.org/repos/tools/managarm_riscv/latest'
+    xbps:
+        x86_64: 'https://repos.managarm.org/repos/amd64/'
+        aarch64: 'https://builds.managarm.org/repos/packages/managarm_aarch64/latest/'
+        riscv64: 'https://builds.managarm.org/repos/packages/managarm_riscv/latest/'
 
 # TODO: We currently don't support computed options or anything of that sort,
 #       so we just define the architecture, and the triple as 2 options