MobileVLCKit: don't try to link against hogweed, nettle, and gmp

MobileVLCKit/MobileVLCKit.xcconfig

@@ -23,7 +23,7 @@ FREETYPE=$(VLC_CONTRIB_DIR)/lib/libfreetype.a
 FRIBIDI=$(VLC_CONTRIB_DIR)/lib/libfribidi.a
 ASS=$(VLC_CONTRIB_DIR)/lib/libass.a
 GCRYPT=$(VLC_CONTRIB_DIR)/lib/libgcrypt.a $(VLC_CONTRIB_DIR)/lib/libgpg-error.a
-GNUTLS=$(VLC_CONTRIB_DIR)/lib/libnettle.a $(VLC_CONTRIB_DIR)/lib/libhogweed.a $(VLC_CONTRIB_DIR)/lib/libgmp.a $(VLC_CONTRIB_DIR)/lib/libgnutls-xssl.a $(VLC_CONTRIB_DIR)/lib/libgnutls.a
+GNUTLS=$(VLC_CONTRIB_DIR)/lib/libgnutls.a
 HARFBUZZ=$(VLC_CONTRIB_DIR)/lib/libharfbuzz.a
 LIVE555=$(VLC_CONTRIB_DIR)/lib/libUsageEnvironment.a $(VLC_CONTRIB_DIR)/lib/libBasicUsageEnvironment.a $(VLC_CONTRIB_DIR)/lib/libgroupsock.a $(VLC_CONTRIB_DIR)/lib/libz.a $(VLC_CONTRIB_DIR)/lib/libliveMedia.a
 MKV=$(VLC_CONTRIB_DIR)/lib/libebml.a $(VLC_CONTRIB_DIR)/lib/libmatroska.a