FreeBSD-EN-20:10.build : incorrect Clang version detection

Versions Affected : All verisons prior to FreeNAS 11.3-U3.2

Description

The Clang and LLD version detection accepted only versions matching the shell glob pattern [1-9].[0-9]*, which notably does not include 10.0. The build then proceeded as if the compiler or linker version was 0.0.