Rename vts-core to vts

Bug: 151896491
Test: m -j vts
Change-Id: I793c88b4b28909d59f44ecfb8466673c799b9702
Merged-In: Ic62d47ccb1de83b79048154538163e9bc017156e
Merged-In: Ib39db27f3e5c7bf56db571f0d651ffd3b59853a2
Merged-In: Ifbdf05c4898723d5aea3daae21bdd5ee5620b7dc

build/vtf.mk

diff --git a/build/vtf.mk b/build/vtf.mk
index d55bac8..b2abee5 100644
--- a/build/vtf.mk
+++ b/build/vtf.mk
@@ -26,7 +26,7 @@
   host-libprotobuf-java-full \
   loganalysis \
   tradefed \
-  vts-core-tradefed \
+  vts-tradefed \
   vts10-tradefed \
   vts10-tradefed-tests \