biology/tRNAscan-SE: fix build with GCC-based architecturs

Add MAKE_JOBS_UNSAFE=yes to fix build.

Remove USES=compiler:c11, it's not necessary.

PR: 237848
Approved by: mzaki@niid.go.jp (maintainer), linimon (mentor)
Differential Revision: https://reviews.freebsd.org/D20439