Remove handwritten makefiles to keep only one build system

[PragmaTwice]

This resolves #574.

[tisonkun]

@PragmaTwice we may still keep some targets in Makefile such as lints to running checker.

In a separated pass we can consider whether adopt Makefile to do such job or port them in scripts or other approaches.

NOTICE: CI failed because of make lint missing a Makefile.

[PragmaTwice]

@PragmaTwice we may still keep some targets in Makefile such as lints to running checker.

In a separated pass we can consider whether adopt Makefile to do such job or port them in scripts or other approaches.

NOTICE: CI failed because of make lint missing a Makefile.

I think lint is the only target which is out of the responsibility of cmake (not sure, becuase actually it can be written into cmake), and it is quite simple, only call two scripts, cppcheck.sh and cpplint.sh.

Hence I consider to remove the target to delete all Makefiles to make sure these handwritten makefiles will not conflict with cmake-generated makefiles (i.e. call cmake . directly on the root directory of the project, which will overwrite current makefiles).

[tisonkun]

@PragmaTwice thanks for your investigation! SGTM do the replacement since it's trivial.

[git-hulk]

LGTM, I like this PR.

[ShooterIT]

Cool job, it is much clear, thanks!

There are many bug reports about linking snappy when using make, i think this PR can also resolve this problem.

[tisonkun]

Merging...

[tisonkun]

@PragmaTwice thanks for your contribution!