Build size_test binaries with debug info

The CI workflow already runs strip before checking size, so this shouldn't break it (and we'll see if it does on this PR). Having debug info makes it much easier to investigate issues with bloaty.


ghstack-source-id: d15388a
ghstack-comment-id: 3009793476
Pull-Request-resolved: #12019

Author: swolchok

test/build_size_test.sh

@@ -26,23 +26,23 @@ cmake_install_executorch_lib() {
   CXXFLAGS="$COMMON_CXXFLAGS" retry cmake -DBUCK2="$BUCK2" \
           -DCMAKE_CXX_STANDARD_REQUIRED=ON \
           -DCMAKE_INSTALL_PREFIX=cmake-out \
-          -DCMAKE_BUILD_TYPE=Release \
+          -DCMAKE_BUILD_TYPE=RelWithDebInfo \
           -DEXECUTORCH_BUILD_EXECUTOR_RUNNER=OFF \
           -DEXECUTORCH_OPTIMIZE_SIZE=ON \
           -DPYTHON_EXECUTABLE="$PYTHON_EXECUTABLE" \
           ${EXTRA_BUILD_ARGS} \
           -Bcmake-out .
-  cmake --build cmake-out -j9 --target install --config Release
+  cmake --build cmake-out -j9 --target install --config RelWithDebInfo
 }
 
 test_cmake_size_test() {
-    CXXFLAGS="$COMMON_CXXFLAGS" retry cmake -DCMAKE_BUILD_TYPE=Release \
+    CXXFLAGS="$COMMON_CXXFLAGS" retry cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo \
         -DCMAKE_INSTALL_PREFIX=cmake-out \
         ${EXTRA_BUILD_ARGS} \
         -Bcmake-out/test test
 
     echo "Build size test"
-    cmake --build cmake-out/test -j9 --config Release
+    cmake --build cmake-out/test -j9 --config RelWithDebInfo
 
     echo 'ExecuTorch with no ops binary size, unstripped:'
     ls -al cmake-out/test/size_test