lighttpd: disable static build

lighttpd modules support code requires shared libraries support.

The scons based build system seems to be support static link of modules, but
we currently don't use scons for lighttpd.

Fixes:
http://autobuild.buildroot.net/results/39c/39c027bf6b76a0f9c15a184f449dadacfaefe980/

[Peter: move to top of file to fix indentation of sub options]
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/lighttpd/Config.in

@@ -1,6 +1,11 @@
+comment "lighttpd needs a toolchain w/ dynamic library"
+	depends on BR2_USE_MMU
+	depends on BR2_PREFER_STATIC_LIB
+
 config BR2_PACKAGE_LIGHTTPD
 	bool "lighttpd"
 	depends on BR2_USE_MMU # fork()
+	depends on !BR2_PREFER_STATIC_LIB
 	help
 	  lighttpd a secure, fast, compliant and very flexible web-server
 	  which has been optimized for high-performance environments. It