x11/wcm: unbreak build after 1b744b6

meson.build:6:10: ERROR: Dependency lookup for wayfire with method 'pkgconfig' failed: Could not generate cflags for wayfire:
Package wlroots was not found in the pkg-config search path.
Perhaps you should add the directory containing `wlroots.pc'
to the PKG_CONFIG_PATH environment variable
Package 'wlroots', required by 'wayfire', not found

x11/wcm/Makefile

@@ -41,4 +41,5 @@ WFSHELL_DESC=			Build with wf-shell support
 WFSHELL_BUILD_DEPENDS=		wf-shell>0:x11/wf-shell
 WFSHELL_MESON_ENABLED=		wf_shell
 
+.include "${.CURDIR:H:H}/x11-toolkits/wlroots016/override.mk"
 .include <bsd.port.mk>