remove bogus CCACHE logic, actually honor CC

net/olsrd/patches/patch-Makefile_inc

@@ -0,0 +1,18 @@
+$OpenBSD: patch-Makefile_inc,v 1.3 2017/05/17 12:46:42 espie Exp $
+
+Index: Makefile.inc
+--- Makefile.inc.orig
++++ Makefile.inc
+@@ -42,12 +42,6 @@ endif
+ #
+ 
+ # programs
+-CCACHE ?=       $(shell IFS=:; for i in $$PATH;do test -x "$$i/ccache" && echo "$$i/ccache" && break; done)
+-ifeq ($(origin CC),default)
+-CC = 		$(CCACHE) gcc
+-else
+-CC ?= 		$(CCACHE) gcc
+-endif
+ ifeq ($(DEBUG),0)
+ STRIP ?=	strip
+ else