Fix optimization build settings (#504)

Default build settings were inadvertantly changed so that optimization
was always disabled. This PR fixes that mistake and updates debug build
configuration to guarantee that optimization is disabled.

Signed-off-by: Will Hawkins <hawkinsw@obs.cr>
Co-authored-by: Alan Jowett <alanjo@microsoft.com>

cmake/settings.cmake

@@ -17,8 +17,7 @@ if(CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
       -Wall
       -Werror
       -Iinc
-      -O0
-      -g
+      -O2
       -Wunused-parameter
       -fPIC
     )
@@ -27,6 +26,7 @@ if(CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
       CMAKE_BUILD_TYPE STREQUAL "RelWithDebInfo")
 
       target_compile_options("ubpf_settings" INTERFACE
+        -O0
         -g
       )
     endif()