Fixes this error reported by CMake caused by 53577d79 (PR #3860):
CMake Warning (dev) at C:/projects/dynamorio/suite/runsuite.cmake:275 (testbuild_ex): A logical block opening on the line C:/projects/dynamorio/suite/runsuite_common_pre.cmake:534 (if) closes on the line C:/projects/dynamorio/suite/runsuite_common_pre.cmake:562 (endif) with mis-matching arguments.
Issue: #2924 (closed)