bsd.linker.mk: Handle Xcode 15 linker identification

The upcoming Xcode 15 introduces a new linker (called ld-prime or ld-new
in some documentation) to replace the classic ld64, which we need to
handle.

Previously, the linker would identify itself as:

@(#)PROGRAM:ld  PROJECT:ld64-<version>

Now, there are two cases. When the classic ld64 is in use, it identifies
itself as:

@(#)PROGRAM:ld-classic  PROJECT:ld64-<version>

When the new linker is in use, it identifies itself as:

@(#)PROGRAM:ld  PROJECT:dyld-<version>

Thus, tweak the detection to allow a -classic suffix in the PROGRAM
string and to allow a dyld- prefix instead of an ld64- prefix on the
version number in the PROJECT string.

MFC after: 1 week