[Android] Added tools (unix bash scripts) to recompile Android extlibs

For some reason, one might want to recompile the extlibs but this is a tedious task. That's why these scripts are provided.
Please read readme.txt before using them!

tools/android/download_sources.sh

@@ -0,0 +1,65 @@
+#!/usr/bin/env bash
+
+FLAC_VERSION=1.2.1
+VORBIS_VERSION=1.3.3
+OGG_VERSION=1.3.1
+
+FLAC=flac-$FLAC_VERSION
+VORBIS=libvorbis-$VORBIS_VERSION
+OGG=libogg-$OGG_VERSION
+
+SNDFILE_VERSION=1.0.25
+SNDFILE=libsndfile-$SNDFILE_VERSION
+
+JPEG_VERSION=9
+JPEG=jpeg-$JPEG_VERSION
+
+FREETYPE_VERSION=2.4.0
+FREETYPE=freetype-$FREETYPE_VERSION
+
+
+mkdir build
+
+wget -nc -P src http://downloads.xiph.org/releases/flac/$FLAC.tar.gz
+if [ ! -d "$PWD/tmp/$FLAC" ]
+then
+	tar -C build -xf src/$FLAC.tar.gz
+fi
+
+wget -nc -P src http://downloads.xiph.org/releases/vorbis/$VORBIS.tar.gz
+if [ ! -d "$PWD/tmp/$VORBIS" ]
+then
+	tar -C build -xf src/$VORBIS.tar.gz
+fi
+
+wget -nc -P src http://downloads.xiph.org/releases/ogg/$OGG.tar.gz
+if [ ! -d "$PWD/tmp/$OGG" ]
+then
+	tar -C build -xf src/$OGG.tar.gz
+fi
+
+wget -nc -P src http://www.mega-nerd.com/libsndfile/files/$SNDFILE.tar.gz
+if [ ! -d "$PWD/tmp/$SNDFILE" ]
+then
+	tar -C build -xf src/$SNDFILE.tar.gz
+fi
+
+wget -nc -P src http://www.ijg.org/files/jpegsrc.v$JPEG_VERSION.tar.gz
+if [ ! -d "$PWD/tmp/$JPEG" ]
+then
+	tar -C build -xf src/jpegsrc.v$JPEG_VERSION.tar.gz
+fi
+
+wget -nc -P src http://download.savannah.gnu.org/releases/freetype/$FREETYPE.tar.gz
+if [ ! -d "$PWD/tmp/$FREETYPE" ]
+then
+	tar -C build -xf src/$FREETYPE.tar.gz
+fi
+
+wget -nc -P src https://github.com/AerialX/openal-soft-android/archive/master.tar.gz
+if [ ! -d "$PWD/tmp/openal-soft-android-master" ]
+then
+	tar -C build -xf src/master.tar.gz
+fi
+
+patch build/openal-soft-android-master/CMakeLists.txt patches/remove-so-version-suffix.diff