Tests: Allow RunCMake expected result code to be a regex

This will allow the '-result.txt' files to specify a regex matching
different results on different platforms.

Tests/RunCMake/RunCMake.cmake

@@ -65,7 +65,7 @@ function(run_cmake test)
       )
   endif()
   set(msg "")
-  if(NOT "${actual_result}" STREQUAL "${expect_result}")
+  if(NOT "${actual_result}" MATCHES "${expect_result}")
     set(msg "${msg}Result is [${actual_result}], not [${expect_result}].\n")
   endif()
   foreach(o out err)