Commit 0b19f236a263a7b0acacd4ea84dc7237303ee3d9

Joel Hockey 2017-10-25T18:11:12

Fixed ICU to set flush correctly and provide pivot buffer. By always setting flush=TRUE when doing multiple reads, ICU will not correctly handle truncated utf8 chars across read boundaries. The fix is to set flush=TRUE only on final read, and to provide a pivot buffer which is maintained by libxml between calls to ucnv_convertEx.