apr: requires shared library support

The apr library requires shared library support unconditionally, so
make it depend on !BR2_PREFER_STATIC_LIB, so that architectures that
support static libraries only do not make this package available.

Solves
http://autobuild.buildroot.org/results/f4cd9751e85e9ee7fde2e9479e0f01ab2be93e84/build-end.log.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/apr-util/Config.in

@@ -5,6 +5,8 @@ config BR2_PACKAGE_APR_UTIL
 	select BR2_PACKAGE_NEON
 	select BR2_PACKAGE_NEON_ZLIB
 	select BR2_PACKAGE_ZLIB
+	# apr really needs shared library support
+	depends on !BR2_PREFER_STATIC_LIB
 	help
 	  The utility library for the apache runtime project
 

package/apr/Config.in

@@ -1,5 +1,7 @@
 config BR2_PACKAGE_APR
 	bool "apr"
+	# apr really needs shared library support
+	depends on !BR2_PREFER_STATIC_LIB
 	help
 	  The mission of the Apache Portable Runtime (APR) project is to create
 	  and maintain software libraries that provide a predictable and