Update GN files w/ changes needed to make sanitizers work.

third_party/instrumented_libraries/BUILD.gn

Index: third_party/instrumented_libraries/BUILD.gn
diff --git a/third_party/instrumented_libraries/BUILD.gn b/third_party/instrumented_libraries/BUILD.gn
index 8ca522c2bcfdc0d8c578519074bdf49a4fca3772..edb45504cac9707e3a4368a37970ba79745d5dc7 100644
--- a/third_party/instrumented_libraries/BUILD.gn
+++ b/third_party/instrumented_libraries/BUILD.gn
@@ -15,16 +15,22 @@ group("deps") {
     deps = [
       ":prebuilt",
     ]
+    data_deps = [
+      ":prebuilt",
+    ]
   }
 }
 
 if (prebuilt_available) {
   group("prebuilt") {
     visibility = [ ":deps" ]
-    all_dependent_configs = [ ":prebuilt_link_helper" ]
+
     deps = [
       ":extract_prebuilt_instrumented_libraries",
     ]
+    data_deps = [
+      ":extract_prebuilt_instrumented_libraries",
+    ]
   }
 
   if (is_msan) {
@@ -52,10 +58,12 @@ if (prebuilt_available) {
     outputs = [
       "$target_out_dir/$archive_prefix.txt",
     ]
+    data = [
+      "$root_out_dir/instrumented_libraries_prebuilt/",
+    ]
   }
 
-  config("prebuilt_link_helper") {
-    visibility = [ ":prebuilt" ]
+  config("prebuilt_instrumented_libraries_ldflags") {
     ldflags = [
       # Add a relative RPATH entry to Chromium binaries. This puts instrumented
       # DSOs before system-installed versions in library search path.
@@ -63,5 +71,8 @@ if (prebuilt_available) {
       "-Wl,-z,origin",
     ]
   }
+} else {
+  config("prebuilt_instrumented_libraries_ldflags") {
+  }
 }
 # TODO(GYP): Support building instrumented libraries from source.