b2g-info: Forcing assertions enabled.
b2g-info: Replacing printf() with puts and putchar where possible.
b2g-info: Fixing partial-read logic in read_whole_file.
b2g-info: Use assignment suppression in /proc/<pid>/stat sscanf for fields we don't care about.
b2g-info: Add TEMP_FAILURE_RETRY around open() and read() calls to /proc in Process::get_int_file.
b2g-info: Fixing strip() function, so it works properly.
b2g-info: Use sysconf(_SC_PAGESIZE) instead of assuming 4k pages.
b2g-info: Fix build system.
b2g-info: opendir() can return EINTR, so add safe_opendir() to utils.h, which (hopefully) does the right thing.