libc/eglibc: enable rpc in eglibc-2.16+

While eglibc-2.16 recommends to use TI-RPC instead of the old sunrpc, the
old one can be included using a configure option. Since the user can still
use TI-RPC to override the libc implementation, we enable rpc unconditionally.

Signed-off-by: Johannes Stezenbach <js@sig21.net>
Message-Id: <20121102140404.GA7707@sig21.net>
Patchwork-Id: 196564

 CT_LOCAL_TARBALLS_DIR="${HOME}/src"

 CT_SAVE_TARBALLS=y

 CT_LOG_EXTRA=y

 CT_ARCH_BE=y

 CT_ARCH_FLOAT_SW=y

 CT_ARCH_arm=y

 CT_BINUTILS_V_2_19_1a=y

 CT_CC_V_4_3_2=y

 CT_LIBC_none=y

 CT_DEBUG_gdb=y

 CT_GMP_V_4_3_2=y

 CT_MPFR_V_2_4_2=y