[glibc] Allow memset local PLT reference for RISC-V.

[Alistair Francis <alistair23@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=d38e1bbda0be2d184f0496001cfeab00216fe01c

commit d38e1bbda0be2d184f0496001cfeab00216fe01c
Author: Alistair Francis <alistair.francis@wdc.com>
Date:   Fri Jun 19 09:00:23 2020 -0700

    Allow memset local PLT reference for RISC-V.
    
    This is similar to commit a26e2e9feab87d4f745c31411458b048742ac733
    "Allow memset local PLT reference for powerpc soft-float.".
    
    GCC 10.1 results in the localplt test failing for RISC-V.
    
    From the original commit for power-pc:
        Since memset is documented as a function GCC may always implicitly
        generate calls to, it seems reasonable to allow that local PLT
        reference (just like those for libgcc functions that GCC implicitly
        generates calls to and that are also exported from libc.so), which
        this patch does.
    
    Acked-by: Palmer Dabbelt <palmerdabbelt@google.com>

Diff:
---
 sysdeps/unix/sysv/linux/riscv/localplt.data | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sysdeps/unix/sysv/linux/riscv/localplt.data b/sysdeps/unix/sysv/linux/riscv/localplt.data
index 0ed8650b65..0a235592c3 100644
--- a/sysdeps/unix/sysv/linux/riscv/localplt.data
+++ b/sysdeps/unix/sysv/linux/riscv/localplt.data
@@ -5,6 +5,7 @@ libc.so: calloc
 libc.so: free
 libc.so: malloc
 libc.so: memalign
+libc.so: memset ?
 libc.so: realloc
 # The TLS-enabled version of these functions is interposed from libc.so.
 ld.so: _dl_signal_error