tests/basic: fix build on ARM32 when NEON disabled

* tests/basic.c (CLUTTER_VECTOR_REGISTER_NEON)
(CLUTTER_VECTOR_REGISTER_AARCH64): Remove check for __ARM_FEATURE_SIMD32.

Cluttering of NEON vector registers was enabled even if NEON was
not active for current compiler target. Issue was caused by
enabling NEON cluttering by wrong feature macro __ARM_FEATURE_SIMD32.

• GnuPG-bug-id: T5251
• Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>