lib/hcrypto: dh-ltm update use of libtommath
warning: 'mp_read_unsigned_bin' is deprecated
(declared at ./libtommath/tommath.h:732): replaced by mp_from_ubin
[-Wdeprecated-declarations]
warning: 'mp_unsigned_bin_size' is deprecated
(declared at ./libtommath/tommath.h:731): replaced by mp_ubin_size
[-Wdeprecated-declarations]
warning: 'mp_to_unsigned_bin' is deprecated
(declared at ./libtommath/tommath.h:733): replaced by mp_to_ubin
[-Wdeprecated-declarations]
warning: 'mp_unsigned_bin_size' is deprecated
(declared at ./libtommath/tommath.h:731): replaced by mp_ubin_size
[-Wdeprecated-declarations]
warning: ignoring return value of 'mp_init_multi',
declared with attribute warn_unused_result [-Wunused-result]
warning: ignoring return value of 'mp_to_unsigned_bin',
declared with attribute warn_unused_result [-Wunused-result]
warning: ignoring return value of 'mp_read_unsigned_bin',
declared with attribute warn_unused_result [-Wunused-result]
Change-Id: I510fd7a57c9cd52b59086a85d13aa6204ebb9fd9