LP #1641612: New compilation warnings with GCC 6 (-Wshift-negative-value, -Wdeprecated-declarations, -Wnonnull-compare, -Wc+11-compat, -Wmisleading-indentation)

**Reported in Launchpad by Laurynas Biveinis last update 24-11-2016 12:31:36

On 5.5 trunk:

[ 7%] Building C object extra/CMakeFiles/innochecksum.dir/innochecksum.c.o
/mnt/workspace/percona-server-5.5-trunk/BUILD_TYPE/debug/Host/ubuntu-yakkety-64bit/extra/innochecksum.c: In function display_format_info:
/mnt/workspace/percona-server-5.5-trunk/BUILD_TYPE/debug/Host/ubuntu-yakkety-64bit/extra/innochecksum.c:60:8: error: left shift of negative value [-Werror=shift-negative-value]
((~(~0 << (DICT_TF_BITS - DICT_TF_FORMAT_SHIFT))) << DICT_TF_FORMAT_SHIFT)
^
/mnt/workspace/percona-server-5.5-trunk/BUILD_TYPE/debug/Host/ubuntu-yakkety-64bit/extra/innochecksum.c:213:28: note: in expansion of macro DICT_TF_FORMAT_MASK
ulint format = flags & DICT_TF_FORMAT_MASK >> DICT_TF_FORMAT_SHIFT;
^~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
extra/CMakeFiles/innochecksum.dir/build.make:62: recipe for target 'extra/CMakeFiles/innochecksum.dir/innochecksum.c.o' failed
make[2]: *** [extra/CMakeFiles/innochecksum.dir/innochecksum.c.o] Error 1
make[2]: Target 'extra/CMakeFiles/innochecksum.dir/build' not remade because of errors.
CMakeFiles/Makefile2:3539: recipe for target 'extra/CMakeFiles/innochecksum.dir/all' failed
make[1]: *** [extra/CMakeFiles/innochecksum.dir/all] Error 2