mandoc: Build dependency for efivar version 38 onwards

- New build only dependency

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Reviewed-by: Peter Müller <peter.mueller@ipfire.org>

config/rootfiles/common/mandoc

@@ -0,0 +1,27 @@
+#usr/bin/apropos
+#usr/bin/demandoc
+#usr/bin/man
+#usr/bin/mandoc
+#usr/bin/soelim
+#usr/bin/whatis
+#usr/man
+#usr/man/man1
+#usr/man/man1/apropos.1
+#usr/man/man1/demandoc.1
+#usr/man/man1/man.1
+#usr/man/man1/mandoc.1
+#usr/man/man1/soelim.1
+#usr/man/man1/whatis.1
+#usr/man/man5
+#usr/man/man5/man.conf.5
+#usr/man/man5/mandoc.db.5
+#usr/man/man7
+#usr/man/man7/eqn.7
+#usr/man/man7/man.7
+#usr/man/man7/mandoc_char.7
+#usr/man/man7/mdoc.7
+#usr/man/man7/roff.7
+#usr/man/man7/tbl.7
+#usr/man/man8
+#usr/man/man8/makewhatis.8
+#usr/sbin/makewhatis