musl: install a few extra headers to improve compatibility with various packages

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@41056 3c298f89-4303-0410-b956-a3cf2f4a3e73
uhttpd: update to the latest version, fixes musl compile issues

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@41057 3c298f89-4303-0410-b956-a3cf2f4a3e73
xfsprogs: fix compile errors with musl

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@41058 3c298f89-4303-0410-b956-a3cf2f4a3e73
util-linux: use qsort instead of qsort_r to fix compile error with musl

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@41059 3c298f89-4303-0410-b956-a3cf2f4a3e73
ubi-utils: fix musl compile errors

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@41060 3c298f89-4303-0410-b956-a3cf2f4a3e73
libnfnetlink: fix musl compile errors

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@41061 3c298f89-4303-0410-b956-a3cf2f4a3e73
mountd: remove a bogus include to fix compile with musl

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@41062 3c298f89-4303-0410-b956-a3cf2f4a3e73