toolchain/Config.in: fix BR2_TOOLCHAIN_HAS_GCC_BUG_99140 number

While introducing gcc bug 99410 I've named BR2_TOOLCHAIN_HAS_GCC_BUG_ to
99140 that is wrong. So let's fix this by changing bug option to
BR2_TOOLCHAIN_HAS_GCC_BUG_99410.

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>