GCC 4.9 fix-ups
add some build-flags to makefile
clean up compiler flags
remove all extra compiler flags:
cpufreq: clean-up:
remove more redundancies:
more clean-up:intelliactive
SELinux: Fix memory leak upon loading policy
readahead: make context readahead more conservative
sync: don't block the flusher thread waiting on IO
customize Preservative governor: