Add the -fno-exceptions flag to the Makefile to avoid the unecessary exceptions support in the executable (we do not use any exception in Stockfish at the moment).
This change gives a 9.2% reduction in size for the executable binary.
Before : executable size = 376956 bytes
After: executable size = 347652 bytes
No functional change.
### 3.1 Selecting compiler (default = gcc)
-CXXFLAGS += -Wall -Wcast-qual -std=c++11 $(EXTRACXXFLAGS)
+CXXFLAGS += -Wall -Wcast-qual -fno-exceptions -std=c++11 $(EXTRACXXFLAGS)
DEPENDFLAGS += -std=c++11
LDFLAGS += $(EXTRALDFLAGS)