package/picotool: fix Config.in comment dependencies

Due to a bug in the Config.in comment dependencies, the comment "***
picotool needs a toolchain w/ C++, threads, gcc >= 4.9 ***" is always
shown even if all features are enabled.

Fixes: d30c1e3c582545a770d40a63be5b7b477d6b1cba ("package/picotool: fix libusb dependencies")
Signed-off-by: Cherniaev Andrei <dungeonlords789@naver.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit d2f5678f4217ab5cadbc4f32f7ca7a8efa8d2bc8)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/picotool/Config.in

@@ -1,6 +1,6 @@
 comment "picotool needs a toolchain w/ C++, threads, gcc >= 4.9"
 	depends on !BR2_INSTALL_LIBSTDCPP || \
-		BR2_TOOLCHAIN_HAS_THREADS || \
+		!BR2_TOOLCHAIN_HAS_THREADS || \
 		!BR2_TOOLCHAIN_GCC_AT_LEAST_4_9
 
 config BR2_PACKAGE_PICOTOOL