Enable PIE for ffmpeg and x264.

Note that the x264 compilation seems to generate non-PIC code even though the option is passed.

submodules/build/builders.d/ffmpeg.mk

@@ -4,7 +4,7 @@ ffmpeg_configure_options=\
 	--disable-ffprobe --disable-ffserver  --disable-avdevice \
 	--disable-avfilter  --disable-network \
 	--disable-everything  --enable-decoder=mjpeg --enable-encoder=mjpeg --enable-decoder=mpeg4 --enable-encoder=mpeg4 \
-	--enable-decoder=h264 --disable-avformat \
+	--enable-decoder=h264 --disable-avformat --enable-pic\
 	--cross-prefix=$$SDK_BIN_PATH/ \
 	--sysroot=$$SYSROOT_PATH --arch=$$ARCH \
 	--enable-static --disable-shared --target-os=darwin \

submodules/build/builders.d/x264.mk

@@ -24,7 +24,7 @@
 
 x264-configure-option= \
 			--host=$(host)\
-			--enable-static \
+			--enable-static --enable-pic \
 			--cross-prefix=$$SDK_BIN_PATH/ \
 			--extra-ldflags="$$COMMON_FLAGS"