Upgrade to libxml 2.9.2 and libxslt 1.1.28

third_party/libxml/patches/LoadLibraryA

Index: third_party/libxml/patches/LoadLibraryA
diff --git a/third_party/libxml/patches/LoadLibraryA b/third_party/libxml/patches/LoadLibraryA
deleted file mode 100644
index 89fff15c86c4cb429de4c5985c4c66c19a15ba37..0000000000000000000000000000000000000000
--- a/third_party/libxml/patches/LoadLibraryA
+++ /dev/null
@@ -1,16 +0,0 @@
-Change 'LoadLibrary' to 'LoadLibraryA' (used with 'const char*' as an
-argument)
-
-Index: libxml/xmlmodule.c
-===================================================================
---- libxml.orig/xmlmodule.c	2010-07-09 14:17:46.959288280 -0700
-+++ libxml/xmlmodule.c	2010-07-09 14:17:55.419051003 -0700
-@@ -300,7 +300,7 @@
- static void *
- xmlModulePlatformOpen(const char *name)
- {
--    return LoadLibrary(name);
-+    return LoadLibraryA(name);
- }
- 
- /*