build: add more default flags to $CFLAGS instead of $CFLAGS_AUTO

This way we make sure the flags are in place when building
dependencies.

configure

@@ -212,19 +212,19 @@ Darwin) CFLAGS_STD="$CFLAGS_STD -D_DARWIN_C_SOURCE" ;;
 AIX)    CFLAGS_STD="$CFLAGS_STD -D_ALL_SOURCE" ;;
 esac
 
-tryflag CFLAGS_AUTO -pipe
+tryflag CFLAGS -pipe
 
 # Try flags to optimize binary size
-tryflag CFLAGS_AUTO -Os
-#tryflag CFLAGS_AUTO -ffunction-sections
-#tryflag CFLAGS_AUTO -fdata-sections
+tryflag CFLAGS -Os
+#tryflag CFLAGS -ffunction-sections
+#tryflag CFLAGS -fdata-sections
 #tryldflag LDFLAGS_AUTO -Wl,--gc-sections
 
 # Try hardening flags
-tryflag CFLAGS_AUTO -fPIE
+tryflag CFLAGS -fPIE
 tryflag CFLAGS_AUTO -fstack-protector-all
-tryldflag LDFLAGS_AUTO -Wl,-z,now
-tryldflag LDFLAGS_AUTO -Wl,-z,relro
+tryldflag LDFLAGS -Wl,-z,now
+tryldflag LDFLAGS -Wl,-z,relro
 #tryldflag LDFLAGS_AUTO -pie
 
 printf "creating config.mk... "