scripts/clean-includes: Update exclude list

Update the exclude list to exclude some more files which don't follow our
standard #include policy.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

scripts/clean-includes

@@ -51,7 +51,7 @@ GIT=no
 DUPHEAD=no
 
 # Extended regular expression defining files to ignore when using --all
-XDIRREGEX='^(tests/tcg|tests/multiboot|pc-bios)'
+XDIRREGEX='^(tests/tcg|tests/multiboot|tests/fp|tests/plugin|tests/uefi-test-tools|pc-bios|subprojects|contrib/plugins|tools/ebpf|ebpf/rss.bpf.skeleton.h|linux-user/(mips64|x86_64)/(cpu_loop|signal).c)'
 
 while true
 do