XFAIL dexter tests on Darwin.

These fail parsing command line arguments.

Author: adrian-prantl

debuginfo-tests/dexter/feature_tests/subtools/help/help.test

@@ -1,3 +1,4 @@
+XFAIL: darwin
 Purpose:
     Check the `help` subtool runs.
 

debuginfo-tests/dexter/feature_tests/subtools/list-debuggers/list-debuggers.test

@@ -1,3 +1,4 @@
+XFAIL: darwin
 Purpose:
     Check the `list-debuggers` subtool runs.
 

debuginfo-tests/dexter/feature_tests/subtools/test/err_paren.cpp

@@ -1,3 +1,4 @@
+// XFAIL: darwin
 // Purpose:
 //      Check that parsing bad commands gives a useful error.
 //          - Unbalanced parenthesis

debuginfo-tests/dexter/feature_tests/subtools/test/err_paren_mline.cpp

@@ -1,3 +1,4 @@
+// XFAIL: darwin
 // Purpose:
 //      Check that parsing bad commands gives a useful error.
 //          - Unbalanced parenthesis over multiple lines

debuginfo-tests/dexter/feature_tests/subtools/test/err_syntax.cpp

@@ -1,3 +1,4 @@
+// XFAIL: darwin
 // Purpose:
 //      Check that parsing bad commands gives a useful error.
 //          - Syntax error (misplaced ',')

debuginfo-tests/dexter/feature_tests/subtools/test/err_syntax_mline.cpp

@@ -1,3 +1,4 @@
+// XFAIL: darwin
 // Purpose:
 //      Check that parsing bad commands gives a useful error.
 //          - Syntax error (misplaced ',') over multiple lines

debuginfo-tests/dexter/feature_tests/subtools/test/err_type.cpp

@@ -1,3 +1,4 @@
+// XFAIL: darwin
 // Purpose:
 //      Check that parsing bad commands gives a useful error.
 //          - Type error (missing args)

debuginfo-tests/dexter/feature_tests/subtools/test/err_type_mline.cpp

@@ -1,3 +1,4 @@
+// XFAIL: darwin
 // Purpose:
 //      Check that parsing bad commands gives a useful error.
 //          - Type error (missing args) over multple lines

debuginfo-tests/dexter/feature_tests/unittests/run.test

@@ -1,3 +1,4 @@
+XFAIL: darwin
 Purpose:
     Run DExTer unit tests.