Fix ASAN build in GN.

Also add missing dependency in mandoline.

Review URL: https://codereview.chromium.org/1126703005

Cr-Original-Commit-Position: refs/heads/master@{#328396}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 7080a81857e6a5be8eed11942ead222e98e5b34f

config/sanitizers/BUILD.gn

@@ -30,6 +30,10 @@ source_set("options_sources") {
     "//build/sanitizers/sanitizer_options.cc",
   ]
 
+  if (is_asan) {
+    sources += [ "//build/sanitizers/asan_suppressions.cc" ]
+  }
+
   if (is_tsan) {
     sources += [ "//build/sanitizers/tsan_suppressions.cc" ]
   }