use G_GNUC_NORETURN instead of ATTRIBUTE_NORETURN

Remove all usage of ATTRIBUTE_NORETURN in favor of GLib's
G_GNUC_NORETURN.
Signed-off-by: NJán Tomko <jtomko@redhat.com>
Reviewed-by: NMichal Privoznik <mprivozn@redhat.com>

src/lxc/lxc_container.c

@@ -116,7 +116,7 @@ static int lxcContainerMountFSBlock(virDomainFSDefPtr fs,
  * in a child pid namespace if container reboot support exists.
  * Otherwise, it will either succeed or return -EPERM.
  */
-ATTRIBUTE_NORETURN static int
+G_GNUC_NORETURN static int
 lxcContainerRebootChild(void *argv)
 {
     int *cmd = argv;

src/network/leaseshelper.c

@@ -47,7 +47,7 @@ helperVersion(const char *argv0)
     printf("%s (%s) %s\n", argv0, PACKAGE_NAME, PACKAGE_VERSION);
 }
 
-ATTRIBUTE_NORETURN static void
+G_GNUC_NORETURN static void
 usage(int status)
 {
     if (status) {

src/util/iohelper.c

@@ -175,7 +175,7 @@ runIO(const char *path, int fd, int oflags)
 
 static const char *program_name;
 
-ATTRIBUTE_NORETURN static void
+G_GNUC_NORETURN static void
 usage(int status)
 {
     if (status) {

src/util/virprocess.c

@@ -1214,7 +1214,7 @@ virProcessSetupPrivateMountNS(void)
 #endif /* !defined(HAVE_SYS_MOUNT_H) || !defined(HAVE_UNSHARE) */
 
 #if defined(__linux__)
-ATTRIBUTE_NORETURN static int
+G_GNUC_NORETURN static int
 virProcessDummyChild(void *argv ATTRIBUTE_UNUSED)
 {
     _exit(0);

src/util/virprocess.h

@@ -46,7 +46,7 @@ virProcessTranslateStatus(int status);
 void
 virProcessAbort(pid_t pid);
 
-void virProcessExitWithStatus(int status) ATTRIBUTE_NORETURN;
+void virProcessExitWithStatus(int status) G_GNUC_NORETURN;
 
 int
 virProcessWait(pid_t pid, int *exitstatus, bool raw)

tests/eventtest.c

@@ -158,7 +158,7 @@ static pthread_cond_t eventThreadJobCond = PTHREAD_COND_INITIALIZER;
 static int eventThreadJobDone;
 
 
-ATTRIBUTE_NORETURN static void *eventThreadLoop(void *data ATTRIBUTE_UNUSED) {
+G_GNUC_NORETURN static void *eventThreadLoop(void *data ATTRIBUTE_UNUSED) {
     while (1) {
         pthread_mutex_lock(&eventThreadMutex);
         while (!eventThreadRunOnce)