q5base: use TARGET_MAKE_ENV

So our tools (E.G. pkg-config) in $(HOST_DIR) are found.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/qt5/qt5base/qt5base.mk

@@ -173,6 +173,7 @@ endif
 define QT5BASE_CONFIGURE_CMDS
 	$(QT5BASE_CONFIGURE_CONFIG_FILE)
 	(cd $(@D); \
+		$(TARGET_MAKE_ENV) \
 		PKG_CONFIG="$(PKG_CONFIG_HOST_BINARY)" \
 		PKG_CONFIG_LIBDIR="$(STAGING_DIR)/usr/lib/pkgconfig" \
 		PKG_CONFIG_SYSROOT_DIR="$(STAGING_DIR)" \
@@ -196,11 +197,11 @@ define QT5BASE_CONFIGURE_CMDS
 endef
 
 define QT5BASE_BUILD_CMDS
-	$(MAKE) -C $(@D)
+	$(TARGET_MAKE_ENV) $(MAKE) -C $(@D)
 endef
 
 define QT5BASE_INSTALL_STAGING_CMDS
-	$(MAKE) -C $(@D) install
+	$(TARGET_MAKE_ENV) $(MAKE) -C $(@D) install
 	$(QT5_LA_PRL_FILES_FIXUP)
 endef