-Db_coverage=true has no effect in meson 0.60.1

[qmor]

Describe the bug
looks like option -Db_coverage=true ignored by meson.

To Reproduce

make a simple meson.build and try to generate build scripts for ninja backend with option -Db_coverage=true

meson build -Db_coverage=true

Expected behavior
build.ninja must contains Coverage rules section

system parameters

• This is not a cross build
• Windows 10 with installed gcovr (by pip) in PATH
• Python version is 3.9.0
• meson --version 0.60.1
• ninja --version 1.10.2.git.kitware.jobserver-1

Looking for source code i've found in ninjabackend.py:560 what b_coverage variable located in self.environment.options (in str representation), but code is trying to find it in self.environment.coredata.options, but i'm not an expert in meson source code

[tristan957]

I am assuming this doesn't happen anymore and should be closed.

cc @eli-schwartz