testsuite: recomp15 fails with deprecation warning from ld.bfd

Summary

Test recomp15 results in the following warning:

+/usr/bin/ld.bfd: warning: ManySections.o: missing .note.GNU-stack section implies executable stack
+/usr/bin/ld.bfd: NOTE: This behaviour is deprecated and will be removed in a future version of the linker

Steps to reproduce

hadrian/build test --only=recomp015

Expected behavior

Test recomp15 passes

Environment

GHC version used: HEAD
Operating System: openSUSE Linux Leap 15.3
System Architecture: x86_64
LD: GNU ld (GNU Binutils; SUSE Linux Enterprise 15) 2.39.0.20220810-150100.7.40

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