rp2/CMakeLists: Enable debug symbols in all builds.

Allows using gdb, addr2line, etc. on a "release" ELF file.

No impact to .bin or .uf2 size, only the .elf will get bigger.

This work was funded through GitHub Sponsors.
Signed-off-by: Angus Gratton <angus@redyak.com.au>

ports/rp2/CMakeLists.txt

@@ -406,6 +406,7 @@ target_include_directories(${MICROPY_TARGET} PRIVATE
 target_compile_options(${MICROPY_TARGET} PRIVATE
     -Wall
     -Werror
+    -g  # always include debug information in the ELF
 )
 
 target_link_options(${MICROPY_TARGET} PRIVATE