Makefile.in: comment out deletion of include/ucontext.h,

it is included from include/signal.h.

Makefile.in

@@ -316,7 +316,8 @@ endif
 ifneq ($(UCLIBC_SUSV3_LEGACY),y)
 	# Remove timeb.h since the LEGACY ftime() was disabled upon request
 	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/sys/timeb.h
-	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/ucontext.h
+	# BREAKAGE: include/signal.h uses it, this rm broke bbox compile:
+	### $(RM) $(PREFIX)$(DEVEL_PREFIX)include/ucontext.h
 	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/regexp.h
 endif
 ifneq ($(UCLIBC_HAS_EPOLL),y)