testsuite: FAILs in funcargs.exp

[Michael Elizabeth Chastain]

There is a long comment about this starting at line 137 of
gdb.base/condbreak.exp.

gdb prints '0xNNNNNNNN in function' when the instruction pointer
does not map to the first instruction of a line.  This is a common
issue when the function is nearly empty, like call6k or hitbottom.

It's a real bug with the gcc line number notes, but it's so harmless
to users that I would not bother to fix it.

BTW I am working on an 'empty.exp' test script to test a variety
of empty functions and their line number notes.

Michael C