kodi/amlogic: reduce samba chunk size to 32k to improve playback

origin patch from sam@osmc
https://github.com/osmc/osmc/blob/master/package/mediacenter-osmc/patches/vero3-118-SMBFile-read-in-chunks-of-32768K.patch

packages/mediacenter/kodi/patches/amlogic/kodi-ce-112-reduce-samba-chunksize-to-32k.patch

@@ -0,0 +1,28 @@
+diff --git a/xbmc/platform/posix/filesystem/SMBFile.cpp b/xbmc/platform/posix/filesystem/SMBFile.cpp
+index e93b0be..6c72c49 100644
+--- a/xbmc/platform/posix/filesystem/SMBFile.cpp
++++ b/xbmc/platform/posix/filesystem/SMBFile.cpp
+@@ -509,8 +509,8 @@ int CSMBFile::Truncate(int64_t size)
+
+ ssize_t CSMBFile::Read(void *lpBuf, size_t uiBufSize)
+ {
+-  if (uiBufSize > SSIZE_MAX)
+-    uiBufSize = SSIZE_MAX;
++  if (uiBufSize > 32768)
++    uiBufSize = 32768;
+
+   if (m_fd == -1)
+     return -1;
+diff --git a/xbmc/platform/posix/filesystem/SMBFile.h b/xbmc/platform/posix/filesystem/SMBFile.h
+index 8947722..fd08496 100644
+--- a/xbmc/platform/posix/filesystem/SMBFile.h
++++ b/xbmc/platform/posix/filesystem/SMBFile.h
+@@ -77,7 +77,7 @@ public:
+   bool OpenForWrite(const CURL& url, bool bOverWrite = false) override;
+   bool Delete(const CURL& url) override;
+   bool Rename(const CURL& url, const CURL& urlnew) override;
+-  int GetChunkSize() override { return 64*1024; }
++  int GetChunkSize() override { return 32*1024; }
+   int IoControl(EIoControl request, void* param) override;
+
+ protected: