tests: Convert test/xi1/ to single binary

Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Mihail Konev <k.mvc@ya.ru>

test/tests-common.c

@@ -0,0 +1,33 @@
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include "tests-common.h"
+
+void
+run_test_in_child(int (*func)(void), const char *funcname)
+{
+    int cpid;
+    int csts;
+    int exit_code = -1;
+
+    printf("\n---------------------\n%s...\n", funcname);
+    cpid = fork();
+    if (cpid) {
+        waitpid(cpid, &csts, 0);
+        if (!WIFEXITED(csts))
+            goto child_failed;
+        exit_code = WEXITSTATUS(csts);
+        if (exit_code == 0)
+            printf(" Pass\n");
+        else {
+child_failed:
+            printf(" FAIL\n");
+            exit(exit_code);
+        }
+    } else {
+        exit(func());
+    }
+}