Fix llvm tests

[PerfectCarl]

Running org.robovm.llvm.ModuleTest
Loading: binding/windows/x86/librobovm-llvm.dll
Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 10.638 sec <<< FAILURE!
Running org.robovm.llvm.TargetMachineTest
Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.001 sec
Running org.robovm.llvm.TargetTest
Tests run: 6, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 0.001 sec <<< FAILURE!

Results :

Failed tests:   testLookupTarget(org.robovm.llvm.TargetTest): LlvmException expected

Tests in error:
  testParseIRString(org.robovm.llvm.ModuleTest): Write failed

Tests run: 9, Failures: 1, Errors: 1, Skipped: 0