Check in the libxslt roll script.

third_party/libxslt/BUILD.gn

Index: third_party/libxslt/BUILD.gn
diff --git a/third_party/libxslt/BUILD.gn b/third_party/libxslt/BUILD.gn
index 6e8dcc980a2299396515f4260e19f127d84b1cb2..87e25a4e69870c306fc55894aa38b0c76875954b 100644
--- a/third_party/libxslt/BUILD.gn
+++ b/third_party/libxslt/BUILD.gn
@@ -4,7 +4,7 @@
 
 config("libxslt_config") {
   defines = [ "LIBXSLT_STATIC" ]
-  include_dirs = [ "." ]
+  include_dirs = [ "src" ]
 }
 
 config("libxslt_warnings") {
@@ -22,51 +22,51 @@ config("libxslt_warnings") {
 
 static_library("libxslt") {
   sources = [
-    "libxslt/attributes.c",
-    "libxslt/attributes.h",
-    "libxslt/attrvt.c",
-    "libxslt/documents.c",
-    "libxslt/documents.h",
-    "libxslt/extensions.c",
-    "libxslt/extensions.h",
-    "libxslt/extra.c",
-    "libxslt/extra.h",
-    "libxslt/functions.c",
-    "libxslt/functions.h",
-    "libxslt/imports.c",
-    "libxslt/imports.h",
-    "libxslt/keys.c",
-    "libxslt/keys.h",
-    "libxslt/libxslt.h",
-    "libxslt/namespaces.c",
-    "libxslt/namespaces.h",
-    "libxslt/numbers.c",
-    "libxslt/numbersInternals.h",
-    "libxslt/pattern.c",
-    "libxslt/pattern.h",
-    "libxslt/preproc.c",
-    "libxslt/preproc.h",
-    "libxslt/security.c",
-    "libxslt/security.h",
-    "libxslt/templates.c",
-    "libxslt/templates.h",
-    "libxslt/transform.c",
-    "libxslt/transform.h",
-    "libxslt/trio.h",
-    "libxslt/triodef.h",
-    "libxslt/variables.c",
-    "libxslt/variables.h",
-    "libxslt/win32config.h",
-    "libxslt/xslt.c",
-    "libxslt/xslt.h",
-    "libxslt/xsltInternals.h",
-    "libxslt/xsltconfig.h",
-    "libxslt/xsltexports.h",
-    "libxslt/xsltlocale.c",
-    "libxslt/xsltlocale.h",
-    "libxslt/xsltutils.c",
-    "libxslt/xsltutils.h",
-    "libxslt/xsltwin32config.h",
+    "src/libxslt/attributes.c",
+    "src/libxslt/attributes.h",
+    "src/libxslt/attrvt.c",
+    "src/libxslt/documents.c",
+    "src/libxslt/documents.h",
+    "src/libxslt/extensions.c",
+    "src/libxslt/extensions.h",
+    "src/libxslt/extra.c",
+    "src/libxslt/extra.h",
+    "src/libxslt/functions.c",
+    "src/libxslt/functions.h",
+    "src/libxslt/imports.c",
+    "src/libxslt/imports.h",
+    "src/libxslt/keys.c",
+    "src/libxslt/keys.h",
+    "src/libxslt/libxslt.h",
+    "src/libxslt/namespaces.c",
+    "src/libxslt/namespaces.h",
+    "src/libxslt/numbers.c",
+    "src/libxslt/numbersInternals.h",
+    "src/libxslt/pattern.c",
+    "src/libxslt/pattern.h",
+    "src/libxslt/preproc.c",
+    "src/libxslt/preproc.h",
+    "src/libxslt/security.c",
+    "src/libxslt/security.h",
+    "src/libxslt/templates.c",
+    "src/libxslt/templates.h",
+    "src/libxslt/transform.c",
+    "src/libxslt/transform.h",
+    "src/libxslt/trio.h",
+    "src/libxslt/triodef.h",
+    "src/libxslt/variables.c",
+    "src/libxslt/variables.h",
+    "src/libxslt/win32config.h",
+    "src/libxslt/xslt.c",
+    "src/libxslt/xslt.h",
+    "src/libxslt/xsltInternals.h",
+    "src/libxslt/xsltconfig.h",
+    "src/libxslt/xsltexports.h",
+    "src/libxslt/xsltlocale.c",
+    "src/libxslt/xsltlocale.h",
+    "src/libxslt/xsltutils.c",
+    "src/libxslt/xsltutils.h",
+    "src/libxslt/xsltwin32config.h",
     "linux/config.h",
     "mac/config.h",
     "win32/config.h",