scrcpy: Move libusb dependency from build to lib

The scrcpy binary links against libusb, so it should be available at
runtime:

| $> otool -L /opt/local/bin/scrcpy | grep libusb
|   /opt/local/lib/libusb-1.0.0.dylib (compatibility version 4.0.0, current version 4.0.0)
| $> port provides /opt/local/lib/libusb-1.0.0.dylib
| /opt/local/lib/libusb-1.0.0.dylib is provided by: libusb

See Genymobile/scrcpy#2256 (comment).

multimedia/scrcpy/Portfile

@@ -6,7 +6,7 @@ PortGroup           meson 1.0
 PortGroup           compiler_blacklist_versions 1.0
 
 github.setup        Genymobile scrcpy 1.24 v
-revision            0
+revision            1
 
 categories          multimedia
 platforms           darwin
@@ -33,11 +33,11 @@ checksums           ${distname}${extract.suffix} \
                     size    41159
 
 depends_build-append \
-                    port:libusb \
                     port:pkgconfig
 
 depends_lib-append  path:lib/libavcodec.dylib:ffmpeg \
-                    port:libsdl2
+                    port:libsdl2 \
+                    port:libusb
 
 depends_run-append  port:android-platform-tools