package/apcupsd: always depend on threads

Fixes:
http://autobuild.buildroot.net/results/aa2ad7bdb37da611a4ec863ed2e986f34ea5228b/build-end.log

Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/apcupsd/Config.in

@@ -1,6 +1,7 @@
 config BR2_PACKAGE_APCUPSD
 	bool "apcupsd"
 	depends on BR2_INSTALL_LIBSTDCPP
+	depends on BR2_TOOLCHAIN_HAS_THREADS
 	depends on BR2_USE_MMU # fork()
 	help
 	  A daemon for controlling APC UPSes.
@@ -64,6 +65,6 @@ comment "usb support needs a toolchain w/ threads"
 
 endif
 
-comment "apcupsd needs a toolchain w/ C++"
+comment "apcupsd needs a toolchain w/ C++, threads"
 	depends on BR2_USE_MMU
-	depends on !BR2_INSTALL_LIBSTDCPP
+	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_HAS_THREADS