Update gn config after r21578

TBR=bmeurer@chromium.org
LOG=n
BUG=none

Review URL: https://codereview.chromium.org/312513002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21597 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUILD.gn

@@ -462,6 +462,8 @@ source_set("v8_base") {
     "src/hydrogen-sce.h",
     "src/hydrogen-store-elimination.cc",
     "src/hydrogen-store-elimination.h",
+    "src/hydrogen-types.cc",
+    "src/hydrogen-types.h",
     "src/hydrogen-uint32-analysis.cc",
     "src/hydrogen-uint32-analysis.h",
     "src/i18n.cc",