science/dcl: Unbreak build with GCC 10

glrqnp.f:29:56:

29 |       DATA CPARAS(6) / 'REALMIN ' /, RX(6) / Z'00800000' /
   |                                                        1

Error: BOZ literal constant near (1) cannot be assigned to a REAL variable [see '-fno-allow-invalid-boz']
glrqnp.f:28:56:

28 |       DATA CPARAS(5) / 'REALMAX ' /, RX(5) / Z'7F7FFFFF' /
   |                                                        1

Error: BOZ literal constant near (1) cannot be assigned to a REAL variable [see '-fno-allow-invalid-boz']

http://package18.nyi.freebsd.org/data/121amd64-default-PR244494/2020-06-10_18h04m44s/logs/errors/dcl-5.4.8_9.log

PR: 246700