valgrind: fix the shared object issue while prelink ptest
If valgrind-ptest is installed, we will get the some prelink error
like below at do_image:
.../usr/sbin/prelink: /usr/lib64/valgrind/ptest/memcheck/tests/wrap7:\
Could not find one of the dependencies: \
.../usr/sbin//prelink-rtld: error \
while loading shared libraries: wrap7so.so: cannot open shared \
object file: No such file or directory
The wrap7 needs to link the shared object in the path
/usr/lib64/valgrind/ptest/memcheck/tests, but it fails.
So we correct the path for ptest.
Signed-off-by: Zhixiong Chi <zhixiong.chi@windriver.com> Signed-off-by: Chen Qi <Qi.Chen@windriver.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
