Enable initial set of Fedora CI tests

The goal of the Fedora CI is to run "basic functionality" and
"integration" tests.  Avocado's gdbtest.py does both, as it exercises
the Avocado test and utils APIs, and also communicates with GDB, thus
ensuring some integration validation with those packages.

Reference: https://fedoraproject.org/wiki/CI
Signed-off-by: Cleber Rosa <crosa@redhat.com>

tests/gdbtest.py.data/return99.c

@@ -0,0 +1,47 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+void empty()
+{
+}
+
+void write_stdout()
+{
+  fprintf(stdout, "testing output to stdout\n");
+}
+
+void write_stderr()
+{
+  fprintf(stderr, "testing output to stderr\n");
+}
+
+int forkme()
+{
+  int pid;
+
+  pid = fork();
+  if (pid != 0)
+    pid = fork();
+  if (pid != 0)
+    pid = fork();
+
+  return pid;
+}
+
+int main(int argc, char *argv[])
+{
+  int exit_status = 99;
+
+  if (argc > 1)
+    exit_status = atoi(argv[1]);
+
+  empty();
+  write_stdout();
+  write_stderr();
+
+  if (forkme()) {
+    fprintf(stdout, "return %i\n", exit_status);
+  }
+
+  return exit_status;
+}

tests/gdbtest.py.data/segfault.c

@@ -0,0 +1,9 @@
+#include <stdio.h>
+
+int main()
+{
+  int *p = NULL;
+  *p = 0xdead;
+
+  return 0;
+}