Test: Add REQUIRES: asserts to test that now requires stats.

Test was modified in r279670

llvm-svn: 279690

llvm/test/CodeGen/ARM/indirectbr-3.ll

+; REQUIRES: asserts
 ; RUN: llc < %s -mtriple=thumbv7-apple-ios -arm-atomic-cfg-tidy=0 -stats 2>&1 | FileCheck %s
 
 ; If ARMBaseInstrInfo::AnalyzeBlocks returns the wrong value, which was possible