arm64: vdso32: add ARM.exidx* sections

These show up when building with clang+lld.
Signed-off-by: Joey Gouly <joey.gouly@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Link: https://lore.kernel.org/r/20220628151307.35561-2-joey.gouly@arm.comSigned-off-by: Will Deacon <will@kernel.org>

arch/arm64/kernel/vdso32/vdso.lds.S

@@ -60,6 +60,7 @@ SECTIONS
 	}
 
 	ELF_DETAILS
+	.ARM.exidx : { *(.ARM.exidx*) }
 	.ARM.attributes 0 : { *(.ARM.attributes) }
 
 	/DISCARD/	: {