Add xN variants of vst1_types intrinsic.
- [PATCH 0/3] [GCC] arm: vst1_types_xN ACLE intrinsics Ezra.Sitorus
- [PATCH 1/3] [GCC] arm: vst1_types_x2 ACLE intrinsics Ezra.Sitorus
- [PATCH 2/3] [GCC] arm: vst1_types_x3 ACLE intrinsics Ezra.Sitorus
- [PATCH 3/3] [GCC] arm: vst1_types_x4 ACLE intrinsics Ezra.Sitorus
