sframe: Add -nostdlib when testing PR 32789

As a result of the mail exchange in
https://sourceware.org/pipermail/binutils/2026-January/147439.html,
the run_cc_link_test procedure may want to link standard libs
too. However, this is not required for running PR 32789 tests. Add
-nostdlib option.

ld/

	* testsuite/ld-sframe/sframe.exp: Add nostdlib when testing PR
	32789.

Signed-off-by: Claudiu Zissulescu <claudiu.zissulescu-ianculescu@oracle.com>