LoongArch: gas: Fix the types of symbols referred with %le_*_r in the symtab

LoongArch: gas: Fix the types of symbols referred with %le_*_r in the symtab

When a symbol is referred with %le_{hi20,lo12,add}_r, it's definitely a
TLS symbol and we should set its type to TLS in the symtab.  Otherwise
when building Perl with gcc-14 -flto, we get:

/usr/bin/ld: PL_current_context: TLS definition in
./miniperl.ltrans0.ltrans.o section .tbss mismatches non-TLS reference
in ./miniperl.ltrans1.ltrans.o

A minimal reproducer:

    $ cat t1.s
    .section .tbss
    .globl x
    x: .word 0
    $ cat t2.s
    f:
      lu12i.w $a0, %le_hi20_r(x)
      add.d   $a0, $a0, $tp, %le_add_r(x)
      li.w    $a1, 1
      st.w    $a1, $a0, %le_lo12_r(x)
    $ gas/as-new t1.s -o t1.o
    $ gas/as-new t2.s -o t2.o
    $ ld/ld-new t1.o t2.o
    ld/ld-new: x: TLS definition in t1.o section .tbss mismatches
    non-TLS reference in t2.o

Unfortunately this was undetected before Binutils-2.42 release because
GCC < 14 does not use %le_*_r, and without LTO it's very rare to have a
TLS LE definition and its reference in two different translation units.
So this fix should be backported to Binutils-2.42 branch too.

Signed-off-by: Xi Ruoyao <xry111@xry111.site>