libc/eglibc: backport OpenEmbedded patches for eglibc 2.16

With this 3 patches, I was able to build and run an eglibc-based system
on MIPS(el) and ARM targets.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

# Default test suite configuration

# Default DejaGnu configuration

DG_TOOLNAME = gcc

DG_TARGET_HOSTNAME = 127.0.0.1

DG_TARGET_USERNAME = root

# Default tests

DG_C_TESTS = 

DG_CPP_TESTS =