Typos.  A bunch of typos I've been collecting.

Change-Id: I53ab8d17914e6563110354e4052109ac02bf8f3b
Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>
diff --git a/src/vnet/bier/bier_imp_node.c b/src/vnet/bier/bier_imp_node.c
index 5e3b3fb..727e92e 100644
--- a/src/vnet/bier/bier_imp_node.c
+++ b/src/vnet/bier/bier_imp_node.c
@@ -144,7 +144,7 @@
 
                 /*
                  * use TTL 64 for the post enacp MPLS label/BIFT-ID
-                 * this we be decremeted in bier_output node.
+                 * this we be decremented in bier_output node.
                  */
                 vnet_buffer(b0)->mpls.ttl = 65;