drop the trigraphs warning ... there is no reason that we actually want to use trigraphs in uClibc, so if one exists, we should be cutting it out, not ignoring it

Rules.mak

@@ -312,7 +312,7 @@ endif
 endif
 
 # Add a bunch of extra pedantic annoyingly strict checks
-XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing
+XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -fno-strict-aliasing
 ifeq ($(EXTRA_WARNINGS),y)
 XWARNINGS+=-Wnested-externs -Wshadow -Wmissing-noreturn -Wmissing-format-attribute -Wformat=2
 XWARNINGS+=-Wmissing-prototypes -Wmissing-declarations