gnucash unstable: ADD_DEFINITIONS is obsolete for setting C/CXXFLAGS.

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/ae6d2a23 (commit)
	from  https://github.com/Gnucash/gnucash/commit/da0df1c4 (commit)



commit ae6d2a2340af74588cda6dcc550b75c2c7967bc9
Author: John Ralls <jralls at ceridwen.us>
Date:   Tue Feb 13 16:47:20 2018 -0800

    ADD_DEFINITIONS is obsolete for setting C/CXXFLAGS.
    
    And setting -O0 in a debug build is unnecessary, that's the default.



Summary of changes:
 CMakeLists.txt | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)