Fix pinns compilation for TEMP_FAILURE_RETRY

In case the macro is not available we now define it on our own in the
utils.

Signed-off-by: Sascha Grunert <sgrunert@suse.com>

pinns/utils.h

@@ -10,6 +10,17 @@
 #include <syslog.h>
 #include <unistd.h>
 
+#ifndef TEMP_FAILURE_RETRY
+#define TEMP_FAILURE_RETRY(expression)                                         \
+  (__extension__({                                                             \
+    long int __result;                                                         \
+    do                                                                         \
+      __result = (long int)(expression);                                       \
+    while (__result == -1L && errno == EINTR);                                 \
+    __result;                                                                  \
+  }))
+#endif
+
 #define _pexit(s)                                                              \
   do {                                                                         \
     fprintf(stderr, "[pinns:e]: %s: %s\n", s, strerror(errno));                \