Move default sanitizer options into build/ so that WebRTC can import them.

components/nacl.gyp

Index: components/nacl.gyp
diff --git a/components/nacl.gyp b/components/nacl.gyp
index 5bbfe26984a3c1c014f0fc5f6854ee93014b586c..2420557126b87a8684cefd47abe8882ec4399967 100644
--- a/components/nacl.gyp
+++ b/components/nacl.gyp
@@ -246,8 +246,8 @@
               'cflags': ['-fPIE'],
               'ldflags!': [
                 # Do not pick the default ASan options from
-                # base/debug/sanitizer_options.cc to avoid a conflict with those
-                # in nacl/nacl_helper_linux.cc.
+                # build/sanitizers/sanitizer_options.cc to avoid a conflict with
+                # those in nacl/nacl_helper_linux.cc.
                 '-Wl,-u_sanitizer_options_link_helper',
               ],
               'link_settings': {