Patch 903-no-examples.patch removes MinOZW binary. This is wrong since
install section of openzwave is still using it. We can either remove the
patch or remove install section for openzwave. It seems people are using
this binary so we remove the patch.

After removing the patch the following issue appears with gcc7:
cc1plus: error: -Wformat-security ignored without -Wformat

This is resolved by adding the following to Makefile
TARGET_CPPFLAGS+=-Wno-format -Wno-format-security

Signed-off-by: Marko Ratkaj <marko.ratkaj@sartura.hr>

Patch 903 disables building of examples.

Patch 904 fixes the following issue:
When building software that build depends on openzwave, build will
always search in /usr/include/openzwave instead of
staging_dir/.../usr/include/openzwave.

Signed-off-by: Marko Ratkaj <marko.ratkaj@sartura.hr>

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>