gdb: use spdx.org license identifiers
gdb: use spdx.org license identifiers

kimrhh/base,oe-lite/base,esben/base,esben/base,hundeboll/base,kimrhh/base,esben/base,moths/base,moths/base,sknsean/base,oe-lite/base,moths/base,sknsean/base,kimrhh/base,moths/base,oe-lite/base,sknsean/base,esben/base,sknsean/base,hundeboll/base,oe-lite/base,hundeboll/base,oe-lite/base,esben/base,hundeboll/base,moths/base,moths/base,kimrhh/base,oe-lite/base,esben/base,sknsean/base,hundeboll/base,sknsean/base,kimrhh/base,hundeboll/base,kimrhh/base