runtests: revert the mistaken edit of $CURL

Regression from c4693adc62

diff --git a/tests/runtests.pl b/tests/runtests.pl
index b962f1646d066b2009e122144d0c2029ff9ce2d7..c83b833a9227a0bf2ac5e9957f34c6dc89f815fa 100755 (executable)
--- a/tests/runtests.pl
+++ b/tests/runtests.pl
@@ -167,7 +167,7 @@ my $VERSION;             # curl's reported version number
 
 my $srcdir = $ENV{'srcdir'} || '.';
 my $CURL="../src/curl".exe_ext('TOOL'); # what curl executable to run on the tests
-my $VCURL="curl";   # what curl binary to use to verify the servers with
+my $VCURL=$CURL;   # what curl binary to use to verify the servers with
                    # VCURL is handy to set to the system one when the one you
                    # just built hangs or crashes and thus prevent verification
 my $DBGCURL=$CURL; #"../src/.libs/curl";  # alternative for debugging