Add possibility to run specific test

[tomrosenback]

During the need to run all test cases defined during development of eg a new protocol is not necessary, minimize test execution time and make it easier to see results from specific test cases within test file

[NiKiZe]

Personally I just run the binary testfile manually without using make to do it, @crankyoldgit do you have any other tips during development?

[tomrosenback]

This PR is replaced by #1625 and as a comment on @NiKiZe comment, yes you can run the binary file manually, but running it through the make command builds the necessary files if needed aswell so you don´t miss out on that.

[crankyoldgit]

Personally I just run the binary testfile manually without using make to do it, @crankyoldgit do you have any other tips during development?

That's what I've done in the past too.

e.g.

# If I'm working on a particular protocol
make ir_Kelvinator_test && ./ir_Kelvinator_test
# or if I only want run a single test (because there are heaps producing errors, or I've got `DEBUG` turned on etc:
make IRutils_test && ./IRutils_test --gtest_filter=TestResultToRawArray.LargeValues