scripts/build: allow installation of *.o files

commit c468820ba9bab93c9d2fd34eba765e52b703b3ee "scripts/build: cleanup"
started to silently remove *.o files from the installation without
giving an explanation why this should be needed.

Drop that as it prevents packages from including *.o files in the
image, which eg is needed to include IR BPF decoders in LibreELEC.

Packages which install *.o files that should not end up in the image
should manually remove these in post_makeinstall_target.

Signed-off-by: Matthias Reichl <hias@horus.com>

scripts/build

@@ -468,7 +468,6 @@ if [ "${TARGET}" = "target" -o "${TARGET}" = "init" ]; then
     rm -rf ${INSTALL}/{usr/local/,usr/,}var
     find ${INSTALL} \( -name "*.orig" \
                   -o -name "*.rej" \
-                  -o -name "*.o" \
                   -o -name "*.in" \
                   -o -name ".git*" \) \
         -exec rm -f {} \; 2>/dev/null || :