librdmacm: Use overloadable function attribute with clang #1475
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This is to fix build warnings seen with upcoming clang19 and
glibc 2.40, since glibc 2.40 has improved fortyfying this
function with clang, it ends up with build errors like below
librdmacm/preload.c:796:9: error: at most one overload for a given name may lack the 'overloadable' attribute
| 796 | ssize_t recvfrom(int socket, void *buf, size_t len, int flags,
| | ^
| /mnt/b/yoe/master/build/tmp/work/core2-64-yoe-linux/rdma-core/51.0/recipe-sysroot/usr/include/sys/socket.h:163:16: note: previous unmarked overload of function is here
| 163 | extern ssize_t recvfrom (int __fd, void *__restrict __buf, size_t __n,
| | ^