[COMMITTED 1/2] riscv: Resolve symbols directly for symbols with STO_RISCV_VARIANT_CC.

[Joseph Myers]

How was this tested?  I've seeing test failures (for all 
build-many-glibcs.py configurations) that look like they were caused by 
this patch.

FAIL: elf/tst-glibcelf
FAIL: elf/tst-relro-ldso
FAIL: elf/tst-relro-libc

/scratch/jmyers/glibc-bot/src/glibc/scripts/../elf/elf.h:4013: error: macro STO_RISCV_VARIANT_CC redefined
/scratch/jmyers/glibc-bot/src/glibc/scripts/../elf/elf.h:3941: note: location of previous definition
/scratch/jmyers/glibc-bot/src/glibc/scripts/../elf/elf.h:4023: error: macro DT_RISCV_VARIANT_CC redefined
/scratch/jmyers/glibc-bot/src/glibc/scripts/../elf/elf.h:3937: note: location of previous definition
Traceback (most recent call last):
  File "/scratch/jmyers/glibc-bot/src/glibc/elf/tst-glibcelf.py", line 23, in <module>
    import glibcelf
  File "/scratch/jmyers/glibc-bot/src/glibc/scripts/glibcelf.py", line 226, in <module>
    _elf_h = _parse_elf_h()
  File "/scratch/jmyers/glibc-bot/src/glibc/scripts/glibcelf.py", line 223, in _parse_elf_h
    raise IOError('parse error in elf.h')
OSError: parse error in elf.h

https://sourceware.org/pipermail/libc-testresults/2023q2/011183.html

-- 
Joseph S. Myers
joseph@codesourcery.com