Windows: Fix various test failures.

interpreter/cling/test/ErrorRecovery/ABI.C

interpreter/cling/test/ErrorRecovery/SubsequentDecls.C

interpreter/cling/test/Extensions/Lookup/ControlFlow.C

interpreter/cling/test/Interfaces/compileFunc.C

interpreter/cling/test/Interfaces/invocationFlags.C

interpreter/cling/test/Interfaces/paths.C

interpreter/cling/test/Pragmas/add_env_path.C

interpreter/cling/test/Prompt/DontWrap.C

interpreter/cling/test/Prompt/Regression.C

interpreter/cling/test/Prompt/ValuePrinter/Assignments.C

interpreter/cling/test/Prompt/ValuePrinter/Regression.C

interpreter/cling/test/Prompt/globalinit.C