[X86][NFC] Replace "<%s" with "< %s" in run-lines.

[X86][NFC] Replace "<%s" with "< %s" in run-lines.

While i have no intention of actually commiting regeneration
of the check lines in these test files with update_llc_test_checks,
lack of that whitespace breaks that util, which is mildly inconvenient.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@352318 91177308-0d34-0410-b5e6-96231b3b80d8