[gn] port 99d92d1

Author: nico

llvm/utils/gn/secondary/compiler-rt/lib/scudo/standalone/BUILD.gn

@@ -51,6 +51,8 @@ source_set("sources") {
     "release.h",
     "report.cpp",
     "report.h",
+    "report_linux.cpp",
+    "report_linux.h",
     "secondary.h",
     "size_class_map.h",
     "stack_depot.h",