package: fix cmake packages build with ninja

+= is needed for CMAKE_OPTIONS.

mt76 needs Ninja disabled as the kernel stuff uses normal make.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

package/kernel/mt76/Makefile

@@ -13,6 +13,7 @@ PKG_SOURCE_VERSION:=22b690334c0f49b11534cc2e331c9d5e17c4a0bc
 PKG_MIRROR_HASH:=ff5e563935919d2e40c1e7254ef3bc06f7ecc5e69f8ddd12903e8f5de942d630
 
 PKG_MAINTAINER:=Felix Fietkau <nbd@nbd.name>
+PKG_USE_NINJA:=0
 PKG_BUILD_PARALLEL:=1
 
 PKG_CONFIG_DEPENDS += \

package/libs/libubox/Makefile

@@ -67,7 +67,7 @@ define Package/libubox-lua
 endef
 
 TARGET_CFLAGS += -I$(STAGING_DIR)/usr/include
-CMAKE_OPTIONS = \
+CMAKE_OPTIONS += \
 	-DLUAPATH=/usr/lib/lua \
 	-DABIVERSION="$(PKG_ABI_VERSION)"
 

package/network/services/uhttpd/Makefile

@@ -85,7 +85,7 @@ endif
 
 TARGET_LDFLAGS += -lcrypt
 
-CMAKE_OPTIONS = -DTLS_SUPPORT=on
+CMAKE_OPTIONS += -DTLS_SUPPORT=on
 
 define Package/uhttpd/install
 	$(INSTALL_DIR) $(1)/etc/init.d

package/system/ubus/Makefile

@@ -53,7 +53,7 @@ endef
 TARGET_CFLAGS += -I$(STAGING_DIR)/usr/include -flto
 TARGET_LDFLAGS += -flto
 
-CMAKE_OPTIONS = \
+CMAKE_OPTIONS += \
 	-DLUAPATH=/usr/lib/lua \
 	-DABIVERSION="$(PKG_ABI_VERSION)"
 

package/system/uci/Makefile

@@ -55,7 +55,7 @@ endef
 TARGET_CFLAGS += -I$(STAGING_DIR)/usr/include
 TARGET_LDFLAGS += -L$(STAGING_DIR)/usr/lib
 
-CMAKE_OPTIONS = \
+CMAKE_OPTIONS += \
 	-DLUAPATH=/usr/lib/lua \
 	$(if $(DEBUG),-DUCI_DEBUG=ON)