[DO-971] ffmpeg recipe with requirements (!9)

Co-authored-by: aleksandr.vodyanov <aleksandr.vodyanov@avroid.tech>
Reviewed-on: https://git.avroid.tech/Conan/conan_build/pulls/9

recipes/libsvtav1/all/test_package/test_package.cpp

@@ -0,0 +1,8 @@
+#include "EbSvtAv1Enc.h"
+#ifdef HAVE_DECODER
+#   include "EbSvtAv1Dec.h"
+#endif
+
+#include <iostream>
+
+int main() { std::cout << svt_av1_get_version() << "\n"; }