fswebcam: disable static build

fswebcam doesn't play nicely with static build as it doesn't track its
indirect dependencies in link time. Fixing this requires tracking all indirect
optional dependencies, which is tedious and error prone. Just disable static
build.

This build failure didn't show on the autobuilder for some reason.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/fswebcam/Config.in

@@ -1,6 +1,7 @@
 config BR2_PACKAGE_FSWEBCAM
 	bool "fswebcam"
 	depends on BR2_USE_MMU # fork()
+	depends on !BR2_PREFER_STATIC_LIB
 	select BR2_PACKAGE_GD
 	select BR2_PACKAGE_FREETYPE
 	select BR2_PACKAGE_JPEG
@@ -15,3 +16,7 @@ config BR2_PACKAGE_FSWEBCAM
 	  scp.
 
 	  http://www.firestorm.cx/fswebcam/
+
+comment "fswebcam needs a toolchain w/ dynamic library"
+	depends on BR2_USE_MMU
+	depends on BR2_PREFER_STATIC_LIB