openssl: sanity check that the bignum module is present
The crypto_use_bigint_in_x86-64_perl patch uses the "bigint" module to
transparently support 64-bit integers on 32-bit hosts. Whilst bigint (part of
bignum) is a core Perl module not all distributions install it (notable Fedora
23).
As the error message when bignum isn't installed is obscure, add a task to check
that it is available and alert the user if it isn't.
[ YOCTO #8562 ]
(From OE-Core master rev:
2f9a2fbc46aa435a0a7f7662bb62029ac714f25a)
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
