[ARM][GCC][3/x]: MVE ACLE intrinsics framework patch.

[ARM][GCC][3/x]: MVE ACLE intrinsics framework patch.

This patch is part of MVE ACLE intrinsics framework.

The patch supports the use of emulation for the single-precision arithmetic
operations for MVE. This changes are to support the MVE ACLE intrinsics which
operates on vector floating point arithmetic operations.

Please refer to Arm reference manual [1] for more details.
[1] https://developer.arm.com/docs/ddi0553/latest

2020-03-16  Andre Vieira  <andre.simoesdiasvieira@arm.com>
	        Srinath Parvathaneni  <srinath.parvathaneni@arm.com>

	* config/arm/arm.c (arm_libcall_uses_aapcs_base): Modify function to add
	emulator calls for dobule precision arithmetic operations for MVE.

2020-03-16  Srinath Parvathaneni  <srinath.parvathaneni@arm.com>

	* gcc.target/arm/mve/intrinsics/mve_libcall1.c: New test.
	* gcc.target/arm/mve/intrinsics/mve_libcall2.c: Likewise.