pkg/55842: lang/gcc10-libs buildlink calls lang/gcc8-libs, gcc.mk copypaste error

[jbryn%students.wcpss.net@localhost]

>Number:         55842
>Category:       pkg
>Synopsis:       lang/gcc10-libs buildlink calls lang/gcc8-libs, gcc.mk copypaste error
>Confidential:   no
>Severity:       non-critical
>Priority:       high
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Dec 05 08:25:00 +0000 2020
>Originator:     Jackson Bryn
>Release:        current 12/5/20 03:21 EST5ECT
>Organization:
N/A
>Environment:
Irrelevant
>Description:
gcc10-libs' buildlink file incorrectly calls for gcc 8.3.0 references (causing gcc8-libs to be accidentally built when linked), and mk/compiler/gcc.mk has a dupe error:

NEEDS_GCC9 NEEDS_GCC9

Should be "NEEDS_GCC9" and "NEEDS_GCC10."
>How-To-Repeat:
N/A
>Fix:
N/A