Simplyfyiing Makefile.am for tests.

using a proper variable for just-built unittests whenever possible.

src/questions/tests/Makefile.am

@@ -9,4 +9,4 @@ test_qstrings_LDADD = ../libquestions.a
 test_qarith_SOURCES = test_qarith.c
 test_qarith_LDADD = ../libquestions.a
 
-TESTS = test_qarith test_qstrings
+TESTS = $(check_PROGRAMS)

src/tests/Makefile.am

@@ -10,4 +10,4 @@ test_qa_sock_LDADD = ../qa_sock.o
 test_qa_SOURCES = test_qa
 test_qa_LDADD = ../qa_sock.o ../cmdline.o ../qa.o ../questions/allquestions.o ../questions/libquestions.a
 
-TESTS = test_qa_sock test_qa
+TESTS = $(check_PROGRAMS)