[lldb] Fix finding make tool for tests (#111980)
Fixes 0e913237871e8c9290e82be30be8b3484952eee0 /
https://github.com/llvm/llvm-project/pull/111531
For reasons I can't explain, a clean build works fine for me, and all
the bots are working fine. But if I rebuild in some way the make tool
becomes None.
Looking at the other variables, they had these extra lines so I've added
those for make and it seems to solve the problem.
