[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/libcap/all/test_package/test_package.c

@@ -0,0 +1,15 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <sys/capability.h>
+
+int main(void) {
+    puts("Allocate cap state");
+    cap_t cap = cap_get_proc();
+    if (!cap) {
+        puts("Failed");
+        return EXIT_FAILURE;
+    }
+    puts("Success");
+    cap_free(cap);
+}