hplip: needs dynamic library

hplip needs libdl functionality, so it should depend on
!BR2_STATIC_LIBS.

Fixes:

  http://autobuild.buildroot.net/results/afc01af153b42d13845e2f2828f642e8ccea7e06/

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/hplip/Config.in

@@ -3,6 +3,7 @@ config BR2_PACKAGE_HPLIP
 	depends on BR2_INSTALL_LIBSTDCPP
 	depends on BR2_PACKAGE_CUPS
 	depends on BR2_TOOLCHAIN_HAS_THREADS # libusb
+	depends on !BR2_STATIC_LIBS # libdl
 	select BR2_PACKAGE_LIBUSB
 	select BR2_PACKAGE_JPEG
 	help
@@ -15,6 +16,7 @@ config BR2_PACKAGE_HPLIP
 
 	  http://hplipopensource.com/
 
-comment "hplip needs a toolchain w/ C++, threads"
+comment "hplip needs a toolchain w/ C++, threads, dynamic library"
 	depends on BR2_PACKAGE_CUPS
-	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_HAS_THREADS
+	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_HAS_THREADS || \
+		BR2_STATIC_LIBS