Fix Tester update for Windows.

(cherry picked from commit e4c0b5c6)

tests/TestData.cpp

@@ -150,7 +150,7 @@ namespace Nektar
         {
             tmp = testElement->FirstChildElement("executable");
             ASSERTL0(tmp, "Cannot find 'executable' for test.");
-            m_executable = fs::current_path() / fs::path(tmp->GetText());
+            m_executable = fs::path(tmp->GetText());
 #if defined(RELWITHDEBINFO)
             m_executable += "-rg";
 #elif !defined(NDEBUG)

tests/Tester.cpp.in

@@ -220,10 +220,10 @@ int main(int argc, char *argv[])
                     + " ";
         }
 
-        fs::path execPath = file.GetExecutable();
+        fs::path execPath = startDir / file.GetExecutable();
         if (!fs::exists(execPath))
         {
-            execPath = fs::path(file.GetExecutable());
+            execPath = file.GetExecutable();
         }
 
         command += PortablePath(execPath);