package/open-plc-utils: install packages to /usr/bin

By default, open-plc-utils installs all of the compiled binaries to
/usr/local/bin which is not in the default path provided by Buildroot.

Passing BIN="$(TARGET_DIR)/usr/bin" to make install forces open-plc-utils to
install the compiled binaries to /usr/bin.

Signed-off-by: Adam Duskett <Aduskett@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/open-plc-utils/open-plc-utils.mk

@@ -26,7 +26,8 @@ define OPEN_PLC_UTILS_BUILD_CMDS
 endef
 
 define OPEN_PLC_UTILS_INSTALL_TARGET_CMDS
-	$(TARGET_MAKE_ENV) $(MAKE) ROOTFS=$(TARGET_DIR) -C $(@D) install
+	$(TARGET_MAKE_ENV) $(MAKE) ROOTFS=$(TARGET_DIR) \
+		BIN="$(TARGET_DIR)/usr/bin" -C $(@D) install
 endef
 
 $(eval $(generic-package))