blkid: optional support for TYPE="fstype"

Adapted from patch created by T4ndeta <t4ndeta@gmail.com>

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/util-linux/Config.src b/util-linux/Config.src
index c71b4de..dbf2b0d 100644
--- a/util-linux/Config.src
+++ b/util-linux/Config.src
@@ -40,6 +40,13 @@
 	  WARNING:
 	  With all submodules selected, it will add ~8k to busybox.
 
+config FEATURE_BLKID_TYPE
+	bool "Print filesystem type"
+	default n
+	depends on BLKID
+	help
+	  Show TYPE="filesystem type"
+
 config DMESG
 	bool "dmesg"
 	default y