RISC-V: Adjust stdint.h to stdint-gcc.h for rvv tests

RISC-V: Adjust stdint.h to stdint-gcc.h for rvv tests

This patch would like to align the stdint.h to the stdint-gcc.h for all
the RVV test files. Aka:

stdint.h => stdint-gcc.h

Signed-off-by: Pan Li <pan2.li@intel.com>
gcc/testsuite/ChangeLog:

	* gcc.target/riscv/rvv/autovec/binop/shift-scalar-template.h:
	Replace stdint.h with stdint-gcc.h.
	* gcc.target/riscv/rvv/autovec/binop/shift-template.h: Ditto.
	* gcc.target/riscv/rvv/autovec/binop/vadd-template.h: Ditto.
	* gcc.target/riscv/rvv/autovec/binop/vand-template.h: Ditto.
	* gcc.target/riscv/rvv/autovec/binop/vdiv-template.h: Ditto.
	* gcc.target/riscv/rvv/autovec/binop/vmax-template.h: Ditto.
	* gcc.target/riscv/rvv/autovec/binop/vmin-template.h: Ditto.
	* gcc.target/riscv/rvv/autovec/binop/vmul-template.h: Ditto.
	* gcc.target/riscv/rvv/autovec/binop/vor-template.h: Ditto.
	* gcc.target/riscv/rvv/autovec/binop/vrem-template.h: Ditto.
	* gcc.target/riscv/rvv/autovec/binop/vsub-template.h: Ditto.
	* gcc.target/riscv/rvv/autovec/binop/vxor-template.h: Ditto.
	* gcc.target/riscv/rvv/autovec/series-1.c: Ditto.
	* gcc.target/riscv/rvv/autovec/vmv-imm-run.c: Ditto.
	* gcc.target/riscv/rvv/autovec/vmv-imm-template.h: Ditto.