do not build git repo, but download latest release (travis build)

Author: planrich

travis/build-libunwind.sh

@@ -1,9 +1,8 @@
 #!/bin/bash
 yum install -y libtool
 cd
-git clone --depth 1 git://git.sv.gnu.org/libunwind.git
-cd libunwind/
-# what did you expect? this is centos 5 :), automake is a dinosaur
-sed -i -e "s/LT_INIT/AC_PROG_LIBTOOL/" configure.ac
-./autogen.sh 
+wget http://download.savannah.gnu.org/releases/libunwind/libunwind-1.2.tar.gz
+tar xf libunwind-1.2.tar.gz
+cd libunwind-1.2/
+./configure
 make install