Update: Work around older versions of automake

src/tests/Makefile.am

@@ -13,29 +13,29 @@ check_PROGRAMS =
 # Helper library for TAP tests
 #
 
-libice_ctest_la_SOURCES = %reldir%/ctest_lib.c %reldir%/ctest_lib.h
+libice_ctest_la_SOURCES = tests/ctest_lib.c %reldir%/ctest_lib.h
 noinst_LTLIBRARIES = libice_ctest.la
 
 #
 # Test programs
 #
 
-ctest_suite_test_SOURCES = %reldir%/ctest_suite.c
+ctest_suite_test_SOURCES = tests/ctest_suite.c
 ctest_suite_test_LDADD = libice_ctest.la
 check_PROGRAMS += ctest_suite.test
 
-ctest_resourcematch_test_SOURCES = %reldir%/ctest_resourcematch.c
+ctest_resourcematch_test_SOURCES = tests/ctest_resourcematch.c
 ctest_resourcematch_test_LDADD = libice_ctest.la icecast-resourcematch.o
 check_PROGRAMS += ctest_resourcematch.test
 
-ctest_refobject_test_SOURCES = %reldir%/ctest_refobject.c
+ctest_refobject_test_SOURCES = tests/ctest_refobject.c
 ctest_refobject_test_LDADD = libice_ctest.la \
     common/thread/libicethread.la \
     common/avl/libiceavl.la \
     icecast-refobject.o
 check_PROGRAMS += ctest_refobject.test
 
-ctest_buffer_test_SOURCES = %reldir%/ctest_buffer.c
+ctest_buffer_test_SOURCES = tests/ctest_buffer.c
 ctest_buffer_test_LDADD = libice_ctest.la \
     common/thread/libicethread.la \
     common/avl/libiceavl.la \