CTest: Fix Jacoco Coverage

Rename the example jacoco.xml file to be jacoco.xml.in to stop CMake
from apptempting to calculate Jacoco Coverage when running over itself.

Enclose a push of -1 to the coverage vector to only happen if there is a
fin to calculate for. This prevents a crash if the target file doesn't
exist.

Source/CTest/cmParseJacocoCoverage.cxx

@@ -78,7 +78,10 @@ class cmParseJacocoCoverage::XMLParser: public cmXMLParser
           std::string line;
           FileLinesType& curFileLines =
             this->Coverage.TotalCoverage[this->CurFileName];
+          if(fin)
+            {
             curFileLines.push_back(-1);
+            }
           while(cmSystemTools::GetLineFromStream(fin, line))
           {
             curFileLines.push_back(-1);

Tests/CMakeLists.txt

@@ -2409,6 +2409,8 @@ ${CMake_BINARY_DIR}/bin/cmake -DDIR=dev -P ${CMake_SOURCE_DIR}/Utilities/Release
      "${CMake_BINARY_DIR}/Testing/JacocoCoverage/DartConfiguration.tcl")
   file(COPY "${CMake_SOURCE_DIR}/Tests/JacocoCoverage/Coverage"
     DESTINATION "${CMake_BINARY_DIR}/Testing/JacocoCoverage")
+  configure_file("${CMake_BINARY_DIR}/Testing/JacocoCoverage/Coverage/target/site/jacoco.xml.in"
+    "${CMake_BINARY_DIR}/Testing/JacocoCoverage/Coverage/target/site/jacoco.xml")
   add_test(NAME CTestJacocoCoverage
     COMMAND cmake -E chdir
     ${CMake_BINARY_DIR}/Testing/JacocoCoverage