[master] 1aef67a54 Switch gcov to LLVM 8.0

[Poul-Henning Kamp]

commit 1aef67a543ee0516b42a3bf700b0e1267a39229d
Author: Poul-Henning Kamp <phk at FreeBSD.org>
Date:   Mon May 13 17:43:55 2019 +0000

    Switch gcov to LLVM 8.0

diff --git a/tools/vtest.sh b/tools/vtest.sh
index 4464826e5..c4bc26e02 100755
--- a/tools/vtest.sh
+++ b/tools/vtest.sh
@@ -199,7 +199,9 @@ failedtests () (
 )
 
 if $enable_gcov ; then
-	export CC=gcc6
+	#export CC=gcc6
+	export CC=clang80
+	export GCOVPROG='llvm-cov80 gcov'
 	export CFLAGS="-fprofile-arcs -ftest-coverage -fstack-protector -DDONT_DLCLOSE_VMODS"
 	export MAKEFLAGS=-j1
 fi