Config.in: fix help comment for gcc optimization
The default for is set to BR2_OPTIMIZE_S, the help comment designated
BR2_OPTIMIZE_0 as default.
Changed the help comment to show that BR2_OPTIMIZE_S is the default.
Signed-off-by: Lothar Felten <lothar.felten@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
(cherry picked from commit 4e09fd8bdef6ddea1097f91df07515abde389cd0)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>