interpreters/berry: Fix Wshadow build errors

[speccy88]

Summary

This fixes the current sim:berry Linux CI failure seen from apache/nuttx#19224 after the CRLF patch fix was merged.

The pinned Berry source compiles with two -Wshadow diagnostics in:

• src/be_introspectlib.c
• src/be_module.c

NuttX CI builds sim:berry with -Werror, so those diagnostics fail the build. I added a second local Berry patch that only renames the shadowing local variables, without changing behavior, and apply it in both the Make and CMake fetch paths.

Verification

I verified the patch applies cleanly to the exact pinned Berry ZIP payload after the existing NuttX patch.

I also ran the targeted failing config in the Apache Linux CI container against apache/nuttx#19224 head plus this apps commit:

./tools/testbuild.sh -l -C -x -j $(nproc) -a ../apps \
  -t /github/workspace/sources/nuttx \
  -e '-Wno-cpp -Werror' -S /github/workspace/sim-berry-make.dat

Result: sim:berry Make build passed.

I also tested the CMake/Ninja path:

./tools/testbuild.sh -l -C -x -N -j $(nproc) -a ../apps \
  -t /github/workspace/sources/nuttx \
  -e '-Wno-cpp -Werror' -S /github/workspace/sim-berry-cmake.dat

Result: sim:berry CMake/Ninja build passed.

Local checks:

git diff --check origin/master..HEAD
/tmp/nuttx-pr19224/tools/checkpatch.sh -c -u -m -g origin/master..HEAD

[speccy88]

Updated to use -Wno-shadow instead of carrying a second source patch.

I kept the flag scoped to the Berry build only:

• Make: CFLAGS += -Wno-shadow
• CMake: BERRY_FLAGS now includes -Wno-shadow

I reran the targeted failing config in the Apache Linux CI container against the NuttX PR head plus this apps commit:

./tools/testbuild.sh -l -C -x -j $(nproc) -a ../apps \
  -t /github/workspace/sources/nuttx \
  -e '-Wno-cpp -Werror' -S /github/workspace/sim-berry-make.dat

./tools/testbuild.sh -l -C -x -N -j $(nproc) -a ../apps \
  -t /github/workspace/sources/nuttx \
  -e '-Wno-cpp -Werror' -S /github/workspace/sim-berry-cmake.dat

Both Make and CMake/Ninja sim:berry builds passed.

[cederom]

CI Linux Arm14 failed, restarted, let make sure it pass this time :-)