refact: linux, install path (#10316)

Signed-off-by: fufesou <linlong1266@gmail.com>

flatpak/rustdesk.json

@@ -39,7 +39,7 @@
       "build-commands": [
         "bsdtar -Oxf rustdesk.deb data.tar.xz | bsdtar -xf -",
         "cp -r usr/* /app/",
-        "mkdir -p /app/bin && ln -s /app/lib/rustdesk/rustdesk /app/bin/rustdesk"
+        "mkdir -p /app/bin && ln -s /app/local/rustdesk/rustdesk /app/bin/rustdesk"
       ],
       "sources": [
         {