gcc: don't build documentation

backport of r35807

Signed-off-by: Luka Perkov <luka@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt@35817 3c298f89-4303-0410-b956-a3cf2f4a3e73
[tools] mklibs: upgrade to 0.1.35

Signed-off-by: Luka Perkov <luka@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt@35818 3c298f89-4303-0410-b956-a3cf2f4a3e73
mac80211: fix sending probe requests in client mode, fixes connecting to hidden networks (#13056)

git-svn-id: svn://svn.openwrt.org/openwrt@35819 3c298f89-4303-0410-b956-a3cf2f4a3e73