Magic patch from bug 933336
Bug 936312: Adjust tests' assumptions about B2G's WebGL support.
Bug 942290: Merge ARM exidx info with DWARF if both are present.
Bug 974227 - Allow readlink while sandboxed to work around bug 964455.
sipcc: replace "linux" IPC (SysV msg) with "android" (pthread condvar)
Bug 966547 - Switch sipcc from named to anonymous sockets on Unix.
Bug 974230 - Adjust sandbox so socket() simply fails; SCTP workaround.