Use portable version of strerror_r()

FS-6596 --resolve

src/switch.c

@@ -400,13 +400,13 @@ static void reincarnate_protect(char **argv) {
 				if (execv(argv[0], argv) == -1) {
 					char buf[256];
 					fprintf(stderr, "Reincarnate execv() failed: %d %s\n", errno,
-							strerror_r(errno, buf, sizeof(buf)));
+							switch_strerror_r(errno, buf, sizeof(buf)));
 				}
 				fprintf(stderr, "Trying reincarnate-reexec plan B...\n");
 				if (execvp(argv[0], argv) == -1) {
 					char buf[256];
 					fprintf(stderr, "Reincarnate execvp() failed: %d %s\n", errno,
-							strerror_r(errno, buf, sizeof(buf)));
+							switch_strerror_r(errno, buf, sizeof(buf)));
 				}
 				fprintf(stderr, "Falling back to normal reincarnate behavior...\n");
 				goto refork;