Disable Nacl on Linux GN component builds.

This is a temporary workaround until the other fixes for bug
482415 can land. This shouldn't affect any of the bots, as
the only component GN Linux build we have is also a debug build,
so NaCl was already disabled.

TBR=brettw@chromium.org, bbudge@chromium.org
BUG=482415

Review URL: https://codereview.chromium.org/1104303003

Cr-Original-Commit-Position: refs/heads/master@{#327604}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 1feead57e3a71bbdad4775899b19d0b173ffc7e7

config/features.gni

@@ -32,8 +32,8 @@ declare_args() {
   # the commented out logic.
   # Eventually we want this to be:
   #   enable_nacl = !is_ios && !is_android
-  enable_nacl =
-      (is_linux && !is_chromeos && !is_debug && current_cpu == "x64") || is_nacl
+  enable_nacl = (is_linux && !is_chromeos && !is_component_build &&
+                 current_cpu == "x64") || is_nacl
   enable_nacl_untrusted = enable_nacl
   enable_pnacl = enable_nacl_untrusted