Upgrade to libxml 2.9.2 and libxslt 1.1.28

third_party/libxml/patches/icu-configure

Index: third_party/libxml/patches/icu-configure
diff --git a/third_party/libxml/patches/icu-configure b/third_party/libxml/patches/icu-configure
deleted file mode 100644
index f7e2395a3a0a21075082c986bf9ddeebc9ce056e..0000000000000000000000000000000000000000
--- a/third_party/libxml/patches/icu-configure
+++ /dev/null
@@ -1,28 +0,0 @@
-Modifications to configure.in:
-- set the WITH_ICU flag unconditionally
-- only output files we use
-
-Index: libxml/configure.in
-===================================================================
---- libxml.orig/configure.in	2010-07-09 15:00:21.600113911 -0700
-+++ libxml/configure.in	2010-07-09 15:02:50.299108047 -0700
-@@ -1229,6 +1229,9 @@
- fi
- AC_SUBST(WITH_OUTPUT)
- 
-+WITH_ICU=1
-+AC_SUBST(WITH_ICU)
-+
- WITH_ICONV=0
- if test "$with_iconv" = "no" ; then
-     echo Disabling ICONV support
-@@ -1456,7 +1459,7 @@
- ln -s Copyright COPYING
- 
- # keep on one line for cygwin c.f. #130896
--AC_OUTPUT(libxml2.spec:libxml.spec.in Makefile include/Makefile include/libxml/Makefile doc/Makefile doc/examples/Makefile doc/devhelp/Makefile example/Makefile python/Makefile python/tests/Makefile xstc/Makefile include/libxml/xmlversion.h xml2-config libxml-2.0.pc libxml-2.0-uninstalled.pc python/setup.py)
-+AC_OUTPUT(include/libxml/xmlversion.h xml2-config)
- 
--chmod +x xml2-config python/setup.py
-+chmod +x xml2-config
- echo Done configuring