Many GCC tests fail for AArch64 with current binutils because of
assembler warnings of the form "Warning: ignoring incorrect section
type for .init_array.00100". The same issue was fixed for ARM in
r247015 by using SECTION_NOTYPE when creating those sections; this
patch applies the same fix to AArch64.
Tested with no regressions with cross to aarch64-linux-gnu.
* config/aarch64/aarch64.c (aarch64_elf_asm_constructor)
(aarch64_elf_asm_destructor): Pass SECTION_NOTYPE to get_section
when creating .init_array and .fini_array sections with priority
specified.
From-SVN: r253252
