r288931 | ngie | 2015-10-06 10:08:31 -0700 (Tue, 06 Oct 2015) | 10 lines

Simplify netbsd-tests.test.mk

• projects/bmake and subsequent commits provide SRCTOP; there's no need to manually specify it now.
• Use OBJROOT, not OBJDIR for defining MAKEOBJDIRPREFIX relative paths as a followup to projects/bmake.
• Compute a sane default for TESTSRC

MFC after: 2 weeks