`cross_cmake` doesn't respect `CMAKE_BUILD_TYPE` overrides

[arnaldo2792]

Image I'm using:
Bottlerocket SDK 0.65.1

Issue or Feature Request:

Packages built with cross_cmake can't override CMAKE_BUILD_TYPE as the toolchain.cmake file takes precedence over -D overrides.

I'm trying to overide CMAKE_BUILD_TYPE like so:

%cross_cmake .. \
    -DCMAKE_BUILD_TYPE=RelWithDebInfo
    # ...some other options

I patched the .cmake files of the sources I'm trying to build to print the actual value of CMAKE_BUILD_TYPE and I saw this message:

-- CMAKE_BUILD_TYPE: 'Release' 

When I remove set(CMAKE_BUILD_TYPE Release) from the toolchain file, I see:

-- CMAKE_BUILD_TYPE: 'RelWithDebInfo'