Catch FormatException coming from Convert.ChangeType. (#1635)

String.TrimEnd has a new overload for a single char in .NET Core 2.0. However, when MSBuild encounters this new overload first, it throws a FormatException which is not caught - breaking the build.

The fix is to catch the FormatException just like an InvalidCastException and continue searching the rest of the reflection MethodInfos for a match.

Fix #1634

src/XMakeBuildEngine/Evaluation/Expander.cs

@@ -3608,9 +3608,13 @@ private static object[] CoerceArguments(object[] args, ParameterInfo[] parameter
                         }
                     }
                 }
+                // The coercion failed therefore we return null
                 catch (InvalidCastException)
                 {
-                    // The coercion failed therefore we return null
+                    return null;
+                }
+                catch (FormatException)
+                {
                     return null;
                 }