gengetopt: fix parallel build issues (#18442)

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43440 3c298f89-4303-0410-b956-a3cf2f4a3e73
tools/mkimage: fix build errors (#18445)

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43441 3c298f89-4303-0410-b956-a3cf2f4a3e73