Fixed for test case ../ext/ODBM_File/t/odbm.t:
ok 1 - use ODBM_File;
ok 2 - use Fcntl;
./perl: symbol lookup error: /usr/lib/perl/5.22.0/auto/ODBM_File/ODBM_File.so: undefined symbol: dbminit
The checking "if -e $_.'/libgdbm_compat.so'" doesn't work when cross
build, so always link libgdbm_compat, since perl depends on gdbm and we
always have libgdbm_compat.
Signed-off-by: Robert Yang <liezhi.yang@windriver.com>