Merge branch 'moreCompilerOptimization' into 'master'

enabled more optimization flags

See merge request chat/RocketChatMobileEngine!72

engine.pro

@@ -276,11 +276,13 @@ CONFIG(release, debug|release) {
     DEFINES += QT_NO_DEBUG
     CONFIG += ltcg
     # compiler options: O3 optimize
-    linux:{
-         QMAKE_CXXFLAGS += -O3 -flto
+    linux:!android{
+         QMAKE_CXXFLAGS += -Ofast -flto -funroll-loops -fno-signed-zeros -fno-trapping-math -fopenmp -D_GLIBCXX_PARALLEL
+         LIBS += -fopenmp
+
     }
     android:{
-        QMAKE_CXXFLAGS += -O3 -flto
+         QMAKE_CXXFLAGS += -Ofast -flto -funroll-loops -fno-signed-zeros -fno-trapping-math
     }
     ios:{
         QMAKE_CXXFLAGS += -O3