Fix format check error

Issue: I6AEEI
Test: Build & Boot Devices
Signed-off-by: Ndhy308 <tony.gan@huawei.com>

libc-test/src/functionalext/sigchain/BUILD.gn

@@ -25,4 +25,4 @@ group("functionalext_sigchain_test") {
   foreach(s, functionalext_sigchain_list) {
     deps += [ ":${s}" ]
   }
-}
\ No newline at end of file
+}