eglibc: fix ldd RTLDLIST

eglibc: fix ldd RTLDLIST

The sed expression for retrieving the previous RTLDLIST from ldd script
was also retrieving the double-quotes. Hence, we ended up with a
RTLDLIST like below and ldd would fail:

RTLDLIST=""/lib/ld-linux.so.2 /lib64/ld-linux-x86-64.so.2
/libx32/ld-linux-x32.so.2" /lib/ld-linux-x86-64.so.2"

[YOCTO #3903]

(From OE-Core rev: f2804dc9a9ba666de85b4efb1fd005fa985f4f8a)

Signed-off-by: Laurentiu Palcu <laurentiu.palcu@intel.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>