[PATCH] riscv: add vectorized rawmemchr

[Kito Cheng]

Pushed with minor fix :)

> diff --git a/newlib/libc/machine/riscv/Makefile.inc b/newlib/libc/machine/riscv/Makefile.inc
> index 1fdee8d95..669d3ed0f 100644
> --- a/newlib/libc/machine/riscv/Makefile.inc
> +++ b/newlib/libc/machine/riscv/Makefile.inc
> @@ -15,6 +15,8 @@ libc_a_SOURCES += \
>         %D%/mempcpy.c \
>         %D%/memrchr-asm.S \
>         %D%/memrchr.c \
> +       %D%/rawmemchr-asm.S \
> +       %D%/rawmemchr.c

^^^^ miss backslash at end of line

>         %D%/memset.S \
>         %D%/setjmp.S \
>         %D%/stpcpy.c \