Add a script to indent C files

Use "indent" with a specific configuration
Apply newly-defined coding style to C files
linux-flags: add some compilation warnings
linux/inotify_tmp: add cast to unsigned type to fix strict clang compilation
Sort C types for gen-indent-c
c/recover_segfault: add a program which recovers from segfault on Linux and Windows
linux-flags: add doc and add some flags
c/openmp: fix OpenMP support detection
mbr: fix compilation with clang 3.5.0, which supports 16-bits x86