overlay profiles: Enable cpudetection USE flag in dev-libs/gmp during…

… bootstrap

It normally is enabled by default, but during bootstrap USE flags that
are not force-enabled are disabled. And we need to it avoid bindist
issues that pop up during stage 1 of the SDK build.

sdk_container/src/third_party/coreos-overlay/profiles/coreos/base/package.use.force

@@ -22,3 +22,8 @@ sys-apps/portage -xattr
 
 # Force openssl provider for net-misc/curl
 net-misc/curl ssl openssl curl_ssl_openssl
+
+# Force cpudetection for dev-libs/gmp, so it's also picked up during
+# bootstrap. That way, we won't be hitting bindist restrictions that
+# cause the build in stage1 to fail.
+dev-libs/gmp cpudetection