pigpio: needs thread support

Fixes:

  http://autobuild.buildroot.net/results/2f64c993db402decf92a5f8010033acdbc6b884f/

Signed-off-by: Grzegorz Blach <grzegorz@blach.pl>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/pigpio/Config.in

@@ -1,6 +1,7 @@
 config BR2_PACKAGE_PIGPIO
 	bool "pigpio"
 	depends on BR2_aarch64 || BR2_arm
+	depends on BR2_TOOLCHAIN_HAS_THREADS
 	depends on !BR2_STATIC_LIBS
 	help
 	  Pigpio is a library for the Raspberry Pi which allows
@@ -8,6 +9,6 @@ config BR2_PACKAGE_PIGPIO
 
 	  http://abyz.me.uk/rpi/pigpio/
 
-comment "pigpio needs a toolchain w/ dynamic library"
+comment "pigpio needs a toolchain w/ threads, dynamic library"
 	depends on BR2_aarch64 || BR2_arm
-	depends on !BR2_STATIC_LIBS
+	depends on !BR2_TOOLCHAIN_HAS_THREADS || BR2_STATIC_LIBS