btrfs-progs: btrfsck is a symlink to btrfs

safe half a meg by not copying the btrfs binary twice.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

utils/btrfs-progs/Makefile

  GPL and open for contribution from anyone.
 endef
 
-progs = btrfs btrfsck btrfs-debug-tree btrfs-find-root btrfs-image  \
-	btrfs-map-logical btrfs-show-super btrfstune btrfs-zero-log \
-	fsck.btrfs mkfs.btrfs
+progs = btrfs btrfs-debug-tree btrfs-find-root btrfs-image btrfs-map-logical \
+	btrfs-show-super btrfstune btrfs-zero-log fsck.btrfs mkfs.btrfs
 
 CONFIGURE_ARGS += \
 	--disable-backtrace \
 	$(INSTALL_BIN) $(PKG_INSTALL_DIR)/usr/lib/libbtrfs.so* $(1)/usr/lib
 	$(INSTALL_DIR) $(1)/usr/bin
 	$(INSTALL_BIN) $(addprefix $(PKG_INSTALL_DIR)/usr/bin/, $(progs)) $(1)/usr/bin/
+	ln -s btrfs $(1)/usr/bin/btrfsck
 	$(INSTALL_DIR) $(1)/etc/init.d
 	$(INSTALL_BIN) ./files/btrfs-scan.init $(1)/etc/init.d/btrfs-scan
 endef