package/gerbera: fix linking with std::filesystem

Do not force to CXX_FILESYSTEM_NO_LINK_NEEDED to ON to allow gerbera to
link with the approriate library for std::filesystem

It should be noted that check_cxx_source_runs has been dropped since
version 1.6.0 and
https://github.com/gerbera/gerbera/commit/a3a64bed1d78fc51c7ab298db019c89852acb80c

Fixes:
 - http://autobuild.buildroot.org/results/0fcd0ce167c04f788bf1b9414ae5e7677691c7cf

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
diff --git a/package/gerbera/gerbera.mk b/package/gerbera/gerbera.mk
index 9468def..6e36377 100644
--- a/package/gerbera/gerbera.mk
+++ b/package/gerbera/gerbera.mk
@@ -18,8 +18,7 @@
 	zlib
 GERBERA_CONF_OPTS = \
 	-DWITH_DEBUG=OFF \
-	-DWITH_JS=OFF \
-	-DCXX_FILESYSTEM_NO_LINK_NEEDED=ON
+	-DWITH_JS=OFF
 
 # Uses __atomic_fetch_add_4
 ifeq ($(BR2_TOOLCHAIN_HAS_LIBATOMIC),y)