autofs: not available on static

Uses dlfcn & friends, fixes:
http://autobuild.buildroot.net/results/2f2/2f2dcf8d2af961c0401a4b39f96cefe691a4479b/

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/autofs/Config.in

@@ -3,6 +3,7 @@ config BR2_PACKAGE_AUTOFS
 	depends on BR2_TOOLCHAIN_HAS_THREADS
 	depends on BR2_USE_MMU
 	depends on BR2_TOOLCHAIN_HAS_NATIVE_RPC
+	depends on !BR2_STATIC_LIBS # dlfcn
 	help
 	  Autofs controls the operation of the automount daemons. The
 	  automount daemons automatically mount filesystems when they
@@ -14,6 +15,7 @@ config BR2_PACKAGE_AUTOFS
 
 	  http://www.linuxfromscratch.org/blfs/view/svn/general/autofs.html
 
-comment "autofs needs a toolchain w/ threads, RPC"
+comment "autofs needs a toolchain w/ threads, RPC, dynamic library"
 	depends on BR2_USE_MMU
-	depends on !BR2_TOOLCHAIN_HAS_THREADS || !BR2_TOOLCHAIN_HAS_NATIVE_RPC
+	depends on !BR2_TOOLCHAIN_HAS_THREADS || BR2_STATIC_LIBS || \
+		!BR2_TOOLCHAIN_HAS_NATIVE_RPC