fix MAkefile.am for python wrapper

cython command now works for VPATH builds, test script fixed

Makefile.am

@@ -628,7 +628,7 @@ wrapper_la_LIBADD = libelpa@SUFFIX@.la
 wrapper_la_CFLAGS = $(PYTHON_INCLUDE) $(NUMPY_INCLUDE) $(AM_CFLAGS)
 
 python/pyelpa/wrapper.c: python/pyelpa/wrapper.pyx
-	cython $<
+	cython $< -o $@
 
 # test scripts
 TASKS ?= 2
@@ -654,14 +654,11 @@ endif
 
 test_python.sh:
 	@echo '#!/bin/bash' > $@
-	@echo 'export PYTHONPATH=$$PYTHONPATH:$(top_srcdir)/python' >> $@
-# this is very hacky... is there a better way to get wrapper.so?
-	@echo 'cp .libs/wrapper.so $(top_srcdir)/python/pyelpa' >> $@
+# this is kind of hacky... is there a better way to get wrapper.so?
+	@echo 'export PYTHONPATH=$$PYTHONPATH:$(top_srcdir)/python:./.libs' >> $@
 # the dlopen flags are needed for MKL to work properly...
-	@echo "$(wrapper) python -c 'import sys, os; sys.setdlopenflags(os.RTLD_NOW | os.RTLD_GLOBAL); import pytest; pytest.main([\"$(top_srcdir)/python\"])'" >> $@
-	@echo 'exit_code=$$?' >> $@
-	@echo 'rm $(top_srcdir)/python/pyelpa/wrapper.so' >> $@
-	@echo 'exit $$exit_code' >> $@
+# only in os from python 3.3 on
+	@echo "$(wrapper) $(PYTHON) -c 'import sys, os; sys.setdlopenflags(os.RTLD_NOW | os.RTLD_GLOBAL); import pytest; pytest.main([\"$(top_srcdir)/python\"])'" >> $@
 	@chmod +x $@
 
 include doxygen.am