cre cache: allow for disabling compression (#3670)

With ["cre_compress_cached_data"] = false in settings.reader.lua.
Not using compression for cache files does indeed take more space,
but it does speed up opening, rendering, page turns, and closing,
with big documents.
Bump base and crengine.

base

@@ -1 +1 @@
-Subproject commit 953103e605af32387d0bbc02aefe55b48b05f059
+Subproject commit 4f050420773b9bdb3b50eed284539b05c934a537

frontend/document/credocument.lua

@@ -47,7 +47,8 @@ function CreDocument:cacheInit()
     if lfs.attributes("./cr3cache", "mode") == "directory" then
         os.execute("rm -r ./cr3cache")
     end
-    cre.initCache(DataStorage:getDataDir() .. "/cache/cr3cache", 1024*1024*32)
+    cre.initCache(DataStorage:getDataDir() .. "/cache/cr3cache", 1024*1024*32,
+        G_reader_settings:nilOrTrue("cre_compress_cached_data"))
 end
 
 function CreDocument:engineInit()