CMake: do not add -std= to a list
CMake: do not add -std= to a list

Add quotes to when adding to CMAKE_CXX_FLAGS, otherwise we can get:
-g;-std=c++11
in the middle of the command line.

Signed-off-by: Jiri Slaby <3a42a5d4389f053b0ed9c8486a7a83f2a41a9eea@fi.muni.cz>

staticafi/symbiotic,staticafi/symbiotic,staticafi/symbiotic,staticafi/symbiotic