Modify install rule to use /usr/bin path and not /usr/usr/bin for
installing omxplayer binary and script.
As well, add a variable to let the user specify where to install
the files.

Upstream-Status: Pending
Signed-off-by: Andrei Gherzan <andrei@gherzan.ro>

Index: git/Makefile
===================================================================
--- git.orig/Makefile	2012-08-26 05:03:31.710678243 +0300
+++ git/Makefile	2012-08-26 05:03:11.000000000 +0300
@@ -59,11 +57,11 @@
 	make -f Makefile.ffmpeg install
 
 dist: omxplayer.bin
-	mkdir -p omxplayer-dist/usr/lib/omxplayer
-	mkdir -p omxplayer-dist/usr/usr/bin
-	mkdir -p omxplayer-dist/usr/share/doc
-	cp omxplayer omxplayer.bin omxplayer-dist/usr/usr/bin
-	cp COPYING omxplayer-dist/usr/share/doc/
-	cp README.md omxplayer-dist/usr/share/doc/README
-	cp -a ffmpeg_compiled/usr/lib/*.so* omxplayer-dist/usr/lib/omxplayer/
-	tar -czf omxplayer-dist.tar.gz omxplayer-dist
+	mkdir -p $(DEST)/usr/lib/omxplayer
+	mkdir -p $(DEST)/usr/bin
+	mkdir -p $(DEST)/usr/share/doc
+	cp omxplayer omxplayer.bin $(DEST)/usr/bin
+	cp COPYING $(DEST)/usr/share/doc/
+	cp README.md $(DEST)/usr/share/doc/README
+	cp -a ffmpeg_compiled/usr/lib/*.so* $(DEST)/usr/lib/omxplayer/
+	tar -czf omxplayer-dist.tar.gz $(DEST)