hexagon: vmlinux.lds.S: handle attributes section

After the linked LLVM change, the build fails with
CONFIG_LD_ORPHAN_WARN_LEVEL="error", which happens with allmodconfig:

  ld.lld: error: vmlinux.a(init/main.o):(.hexagon.attributes) is being placed in '.hexagon.attributes'

Handle the attributes section in a similar manner as arm and riscv by
adding it after the primary ELF_DETAILS grouping in vmlinux.lds.S, which
fixes the error.

Link: https://lkml.kernel.org/r/20240319-hexagon-handle-attributes-section-vmlinux-lds-s-v1-1-59855dab8872@kernel.org
Fixes: 113616e ("hexagon: select ARCH_WANT_LD_ORPHAN_WARN")
Link: llvm/llvm-project@31f4b32
Signed-off-by: Nathan Chancellor <[email protected]>
Reviewed-by: Brian Cain <[email protected]>
Cc: Bill Wendling <[email protected]>
Cc: Justin Stitt <[email protected]>
Cc: Nick Desaulniers <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Author: nathanchance

arch/hexagon/kernel/vmlinux.lds.S

@@ -63,6 +63,7 @@ SECTIONS
 	STABS_DEBUG
 	DWARF_DEBUG
 	ELF_DETAILS
+	.hexagon.attributes 0 : { *(.hexagon.attributes) }
 
 	DISCARDS
 }