[binutils-gdb] Introduce and use new_breakpoint_from_type

[sergiodj+buildbot@sergiodj.net]

*** TEST RESULTS FOR COMMIT a5e364af4a3d745bb79cfc9a1d533632d4d04b57 ***

Author: Simon Marchi <simon.marchi@polymtl.ca>
Branch: master
Commit: a5e364af4a3d745bb79cfc9a1d533632d4d04b57

Introduce and use new_breakpoint_from_type

This is a small preparatory patch to factor out a snippet that appears
twice.  More kinds of breakpoints will need to be created based on
bptype, so I think it's a good idea to centralize the instantiation of
breakpoint objects.

gdb/ChangeLog:

	* breakpoint.c (new_breakpoint_from_type): New function.
	(create_breakpoint_sal): Use new_breakpoint_from_type and
	unique_ptr.
	(create_breakpoint): Likewise.