fstools: mark as nonshared and add missing PKG_CONFIG_DEPENDS

The fstools build depends on the CONFIG_NAND_SUPPORT flag, which is
target-specific.

Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>

package/system/fstools/Makefile

@@ -23,6 +23,9 @@ PKG_LICENSE:=GPL-2.0
 PKG_LICENSE_FILES:=
 
 PKG_USE_MIPS16:=0
+PKG_FLAGS:=nonshared
+
+PKG_CONFIG_DEPENDS := CONFIG_NAND_SUPPORT CONFIG_FSTOOLS_UBIFS_EXTROOT
 
 PKG_MAINTAINER:=John Crispin <john@phrozen.org>