jemalloc: support page size up to 64KB on AArch64

The default build configuration only supports page sizes up to 4KB.
AArch64 systems (among other architectures) can be configured with
larger page sizes. nixpkgs's jemalloc currently crashes in these
situations.

pkgs/development/libraries/jemalloc/default.nix

@@ -30,6 +30,9 @@ stdenv.mkDerivation rec {
       "--disable-thp"
       "je_cv_thp=no"
     ]
+    # AArch64 has configurable page size up to 64k. The default configuration
+    # for jemalloc only supports 4k page sizes.
+    ++ lib.optional stdenv.isAarch64 "--with-lg-page=16"
   ;
 
   NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-Wno-error=array-bounds";