tests: fix TS_ENABLE_ASAN usage

Signed-off-by: Karel Zak <kzak@redhat.com>

tests/ts/kill/name_to_number

@@ -38,7 +38,7 @@ for SIG in $($TS_CMD_KILL -L); do
 		EXPECTED=$SIG
 		continue
 	fi
-	if [ -f "$TS_ENABLE_ASAN" ] && [ "x$SIG" = "xSEGV" ]; then
+	if [ "$TS_ENABLE_ASAN" == "yes" ] && [ "x$SIG" = "xSEGV" ]; then
 		continue
 	fi
 	if [ "x$SIG" = "xSTOP" ] || [ "x$SIG" = "xKILL" ]; then

tests/ts/libmount/tabfiles-tags

@@ -8,7 +8,7 @@ ts_init "$*"
 
 ts_skip_nonroot
 
-if [ -f "$TS_ENABLE_ASAN" ]; then
+if [ "$TS_ENABLE_ASAN" == "yes" ]; then
 	TS_KNOWN_FAIL="yes"
 fi