match doesn't process errors from sd_bus_add_match

[fr0st61te]

The sd_bus_add_match() method may return a lot of possible errors - ENOBUFS, ECHILD, EINVAL, etc. In sdbusplus/bus/match.hpp, in match() call the return code of sd_bus_add_match() is not checked, due to which the targeted watchers/listeners may silently fail without reporting anything to the end user.

For instance, some machine having a lot of sensors may have a lot of watchers for them.
However, after exceeding watcher/matchers limit it will not set up any new matches at all.

Another example: if there some typo in 'path', it will be silently eaten by sdbusplus interface.