Fix gn.

TBR=titzer@chromium.org

Review URL: https://codereview.chromium.org/685083002

Cr-Commit-Position: refs/heads/master@{#24962}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24962 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUILD.gn

@@ -480,6 +480,8 @@ source_set("v8_base") {
     "src/compiler/access-builder.h",
     "src/compiler/ast-graph-builder.cc",
     "src/compiler/ast-graph-builder.h",
+    "src/compiler/ast-loop-assignment-analyzer.cc",
+    "src/compiler/ast-loop-assignment-analyzer.h",
     "src/compiler/basic-block-instrumentor.cc",
     "src/compiler/basic-block-instrumentor.h",
     "src/compiler/change-lowering.cc",