package/edid-decode: fix typo in Config.in for comment selection

Fix typo ('!!' vs. '!') Config.in for dependencies comment selection
(introduced by commit 'package/edid-decode: bump version to 1889504',
see [1]).

[1] https://git.buildroot.net/buildroot/commit/?id=d498088fe7e1e664d4ee8d9bc54262d40227d6e5

Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit 0ee49d6272b7046c0d961da0b3950e0f78b89a0b)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/edid-decode/Config.in

@@ -8,5 +8,5 @@ config BR2_PACKAGE_EDID_DECODE
 	  https://git.linuxtv.org/edid-decode.git/
 
 comment "edid-decode needs a toolchain w/ C++, gcc >= 4.7"
-	depends on !!BR2_INSTALL_LIBSTDCPP || \
+	depends on !BR2_INSTALL_LIBSTDCPP || \
 		!BR2_TOOLCHAIN_GCC_AT_LEAST_4_7