dist: Fix crash running deploy-stub on arm64 with 16 KiB pages

arm64/aarch64 kernels may be configured with 4K, 16K or 64K pages, 16K seems to be most common.

The alignment does cause a big waste of space, we may have to revisit the use of mmap, or just mmap the whole executable

direct/src/dist/FreezeTool.py

@@ -2057,6 +2057,9 @@ class Freezer:
         if self.platform.startswith('win'):
             # We don't use mmap on Windows.  Align just for good measure.
             blob_align = 32
+        elif self.platform.endswith('_aarch64') or self.platform.endswith('_arm64'):
+            # Most arm64 operating systems are configured with 16 KiB pages.
+            blob_align = 16384
         else:
             # Align to page size, so that it can be mmapped.
             blob_align = 4096