libc/glibc: fix {e,}glibc add-ons with short or long names

Fixes the issue with {e,}glibc addons having short and long names (such as
eglibc-ports-2_13 and ports), which caused configure scripts to run
through them twice and thus configuring incorrectly.

For instance, the mips64el-n32-linux-gnu toolchain would be recognized
correctly first, but then the second pass would change it to mips32,
building a mixed MIPS-III N32 and MIPS-I libc.

Signed-off-by: Nicolás Reynolds <fauno@kiwwwi.com.ar>
[yann.morin.1992@anciens.enib.fr: remove spurious trailing spaces]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>

# Menu for the native gdbserver

config GDB_GDBSERVER

    bool

    prompt "gdbserver"

    default n

    depends on ! BARE_METAL

    help

      Build and install a gdbserver for the target, to run on the target.

if GDB_GDBSERVER

config GDB_GDBSERVER_STATIC

    bool

    prompt "Build a static gdbserver"

    default y

    help

      In case you have trouble with dynamic loading of shared libraries,

      you will find that a static gdbserver comes in handy.

endif # GDB_GDBSERVER

if BARE_METAL

comment "In bare-metal, you'll need to   "

comment "provide your own gdbserver stub."

endif # BARE_METAL