Modify Android make files to use new toolchain, fix compiler waring

Remove old, unused Android make file.
Fix some problems with standalone build and SDES module

Changes provided by Johan Pascal, Linphone project.
Merge branch 'ndk9' into develop
Fix Thread handling for NetBSD

Found by redent, modified his patch to fix the pthread handling.
Change version number to 4.1.1
NEWS for version 4.1.1
Merge branch 'develop'