cmake: use RelWithDebInfo, not Debug, with CONFIG_DEBUG

Given the description of the configuration option at its definition in
target/sdk/files/Config.in ("Compile packages with debugging info" and "Adds -g3
to the CFLAGS", the more appropriate CMAKE build type is `RelWithDebInfo` rather
than `Debug`.

Signed-off-by: Nathaniel Wesley Filardo <[email protected]>
Link: openwrt/openwrt#18709
Signed-off-by: Robert Marko <[email protected]>

Author: nwf

include/cmake.mk

@@ -97,7 +97,7 @@ define Build/Configure/Default
 			-DCMAKE_SYSTEM_NAME=Linux \
 			-DCMAKE_SYSTEM_VERSION=1 \
 			-DCMAKE_SYSTEM_PROCESSOR=$(ARCH) \
-			-DCMAKE_BUILD_TYPE=$(if $(CONFIG_DEBUG),Debug,Release) \
+			-DCMAKE_BUILD_TYPE=$(if $(CONFIG_DEBUG),RelWithDebInfo,Release) \
 			-DCMAKE_C_FLAGS_RELEASE="-DNDEBUG" \
 			-DCMAKE_CXX_FLAGS_RELEASE="-DNDEBUG" \
 			-DCMAKE_C_COMPILER_LAUNCHER="$(CMAKE_C_COMPILER_LAUNCHER)" \