tests: avoid source dependencies from other dirs in Makefile

That causes compilation errors under certain cirquimstances.

tests/Makefile.am

@@ -45,23 +45,23 @@ if LOCAL_TALLOC
 AM_CPPFLAGS += -I$(srcdir)/../src/ccan/talloc
 endif
 
-kkdcp_parsing_SOURCES = ../src/config-kkdcp.c kkdcp-parsing.c
+kkdcp_parsing_SOURCES = kkdcp-parsing.c
 kkdcp_parsing_LDADD = ../gl/libgnu.a $(LIBTALLOC_LIBS) ../src/ccan/libccan.a
 
-json_escape_SOURCES = ../src/occtl/json.c json-escape.c
+json_escape_SOURCES = json-escape.c
 json_escape_LDADD = ../gl/libgnu.a $(LIBTALLOC_LIBS) ../src/ccan/libccan.a
 
-ipv4_prefix_SOURCES = ../src/ip-util.c ../src/ip-util.h ipv4-prefix.c
+ipv4_prefix_SOURCES = ipv4-prefix.c
 ipv4_prefix_LDADD = ../gl/libgnu.a $(LIBTALLOC_LIBS) ../src/ccan/libccan.a
 
 ban_ips_CPPFLAGS = $(AM_CPPFLAGS) -DDISABLE_LOGS
-ban_ips_SOURCES = ../src/main-ban.c ../src/main.h ban-ips.c
+ban_ips_SOURCES = ban-ips.c
 ban_ips_LDADD = ../gl/libgnu.a $(LIBTALLOC_LIBS) ../src/ccan/libccan.a
 
-str_test_SOURCES = ../src/str.c ../src/str.h str-test.c
+str_test_SOURCES = str-test.c
 str_test_LDADD = ../gl/libgnu.a $(LIBTALLOC_LIBS) ../src/ccan/libccan.a
 
-ipv6_prefix_SOURCES = ../src/ip-util.c ../src/ip-util.h ipv6-prefix.c
+ipv6_prefix_SOURCES = ipv6-prefix.c
 ipv6_prefix_LDADD = ../gl/libgnu.a $(LIBTALLOC_LIBS) ../src/ccan/libccan.a
 
 check_PROGRAMS = str-test ipv4-prefix ipv6-prefix kkdcp-parsing json-escape ban-ips

tests/ban-ips.c

@@ -28,6 +28,7 @@
 #include "../src/main.h"
 #include "../src/main-ban.h"
 #include "../src/ip-util.h"
+#include "../src/main-ban.c"
 
 /* Test the IP banning functionality */
 static

tests/ipv4-prefix.c

@@ -21,6 +21,7 @@
 #include <talloc.h>
 
 #include "../src/ip-util.h"
+#include "../src/ip-util.c"
 
 int main()
 {

tests/ipv6-prefix.c

@@ -21,6 +21,7 @@
 #include <arpa/inet.h>
 
 #include "../src/ip-util.h"
+#include "../src/ip-util.c"
 
 static char* my_ipv6_prefix_to_mask(const char *str, unsigned prefix)
 {

tests/json-escape.c

@@ -24,6 +24,7 @@
 #include <sys/socket.h>
 #include <netdb.h>
 #include "../src/occtl/json.h"
+#include "../src/occtl/json.c"
 
 static char *strings[] = 
 {

tests/kkdcp-parsing.c

@@ -25,6 +25,7 @@
 #include <netdb.h>
 
 #include "../src/common-config.h"
+#include "../src/config-kkdcp.c"
 
 int main()
 {

tests/str-test.c

@@ -15,12 +15,14 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#define _GNU_SOURCE
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <talloc.h>
 
 #include "../src/str.h"
+#include "../src/str.c"
 
 static char *myfunc(void *pool, const char *str)
 {