randomconfig fixes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

scripts/randomtest.loop

@@ -33,6 +33,7 @@ while sleep 1; do
 		)
 		if test $? != 0; then
 			echo "Failed runtest in $dir"
+			grep ^FAIL -- "$dir/testsuite/runtest.log"
 			exit 1 # you may comment this out...
 			let fail++
 			continue

testsuite/tar.tests

@@ -299,7 +299,7 @@ l4/V8LDoe90yiWJhOJvIypgEfxdyRThQkBVn/bI=
 "
 SKIP=
 
-optional UNICODE_SUPPORT FEATURE_TAR_GNU_EXTENSIONS
+optional UNICODE_SUPPORT FEATURE_TAR_GNU_EXTENSIONS FEATURE_SEAMLESS_BZ2
 testing "Pax-encoded UTF8 names and symlinks" '\
 tar xvf ../tar.utf8.tar.bz2 2>&1; echo $?
 export LANG=en_US.UTF-8