MTL OFI: Allow retries in MTL progress for interrupted syscalls

This fixes a regression in sockets provider which could return -EINTR value
from fi_cq_read() due to a syscall being interrupted. The error value is
currently interpreted as fatal condition. Relax the rule so that we can retry
fi_cq_read() operation.

Signed-off-by: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@intel.com>

ompi/mca/mtl/ofi/mtl_ofi.h

@@ -117,7 +117,7 @@ ompi_mtl_ofi_progress(void)
                 exit(1);
             }
         } else {
-            if (ret == -FI_EAGAIN) {
+            if (ret == -FI_EAGAIN || ret == -EINTR) {
                 break;
             } else {
                 opal_output(0, "%s:%d: Error returned from fi_cq_read: %s(%zd).\n"