Make guile test suite default to scm api

In other words guilescm becomes guile.
Deprecated gh api tests are moved to guilegh.

Examples/test-suite/guile/Makefile.in

@@ -2,14 +2,16 @@
 # Makefile for guile test-suite
 #######################################################################
 
+EXTRA_TEST_CASES += guile_ext_test.externaltest
+
 LANGUAGE     = guile
-VARIANT      = _gh
+VARIANT      =
 SCRIPTSUFFIX = _runme.scm
 srcdir       = @srcdir@
 top_srcdir   = @top_srcdir@
 top_builddir = @top_builddir@
 GUILE        = @GUILE@
-GUILE_RUNTIME=-runtime
+GUILE_RUNTIME=
 
 C_TEST_CASES = long_long \
                list_vector \
@@ -20,7 +22,7 @@ C_TEST_CASES = long_long \
 include $(srcdir)/../common.mk
 
 # Overridden variables here
-# none!
+INCLUDES    += -I$(top_srcdir)/$(EXAMPLES)/$(TEST_SUITE)/guile
 
 # Custom tests - tests with additional commandline options
 %.multicpptest: SWIGOPT += $(GUILE_RUNTIME)
@@ -41,6 +43,11 @@ include $(srcdir)/../common.mk
 	+$(swig_and_compile_multi_cpp)
 	$(run_testcase)
 
+%.externaltest:
+	$(setup)
+	+$(swig_and_compile_external)
+	$(run_testcase)
+
 # Runs the testcase. A testcase is only run if
 # a file is found which has _runme.scm appended after the testcase name.
 run_testcase = \