Removed default CFLAGS=-O2 -g in Makefiles

git-svn-id: https://svn.pjsip.org/repos/pjproject/trunk@154 74dad513-b988-da41-8d7b-12977e46ad98
diff --git a/pjsip/build/Makefile b/pjsip/build/Makefile
index 6787c30..8170cd9 100644
--- a/pjsip/build/Makefile
+++ b/pjsip/build/Makefile
@@ -13,7 +13,7 @@
 ###############################################################################
 # Gather all flags.
 #
-export _CFLAGS 	:= -O2 -g $(CC_CFLAGS) $(OS_CFLAGS) $(HOST_CFLAGS) $(M_CFLAGS) \
+export _CFLAGS 	:= $(CC_CFLAGS) $(OS_CFLAGS) $(HOST_CFLAGS) $(M_CFLAGS) \
 		   $(CFLAGS) $(CC_INC)../include $(CC_INC)../../pjlib/include \
 		   $(CC_INC)../../pjlib-util/include $(CC_INC)../../pjmedia/include
 export _CXXFLAGS:= $(_CFLAGS) $(CC_CXXFLAGS) $(OS_CXXFLAGS) $(M_CXXFLAGS) \