rules/ffmpeg: update rule to copy .so to both sysroot.

rules/ffmpeg/default.bash

@@ -15,12 +15,14 @@ md5=\
 
 configure()
 {
+    mkdir -p ../build
     ./configure \
         --sysroot="$cfg_dir_toolchain_sysroot" \
         --prefix="$cfg_dir_rootfs/usr" \
         --incdir="$cfg_dir_toolchain_sysroot/usr/include" \
         --enable-cross-compile \
         --cross-prefix="$cfg_target_canonical-" \
+        --libdir="$cfg_dir_builds/ffmpeg/build" \
         --target-os="linux" \
         --enable-shared \
         --disable-static \
@@ -39,10 +41,16 @@ host_install()
     $cmd_make \
 	LIBDIR="$cfg_dir_toolchain_sysroot/usr/lib" \
         install-headers
+
+    $cmd_make \
+        install-libs
 }
 
 target_install()
 {
     $cmd_make \
         install-libs
+
+    $cmd_cp -r "$cfg_dir_builds/ffmpeg/build/"* "$cfg_dir_rootfs/usr/lib/"
+    $cmd_cp -r "$cfg_dir_builds/ffmpeg/build/"* "$cfg_dir_toolchain_sysroot/usr/lib/"
 }