Fix previous

Pointed out by s_graf at telus.net, patch from Markus Hennecke (thanks!)

While here update patch comments.

lang/gcc/4.9/patches/patch-gcc_Makefile_in

@@ -1,6 +1,7 @@
-$OpenBSD: patch-gcc_Makefile_in,v 1.2 2018/04/25 12:56:56 jca Exp $
+$OpenBSD: patch-gcc_Makefile_in,v 1.3 2018/04/28 16:38:25 jca Exp $
 
-Disable fixincludes madness
+- clang hack needed at least on arm
+- disable fixincludes madness
 
 Index: gcc/Makefile.in
 --- gcc/Makefile.in.orig
@@ -9,7 +10,7 @@ Index: gcc/Makefile.in
  
  CFLAGS-gcc.o += $(DRIVER_DEFINES)
  
-+ISCLANG = $(shell $CC --version | grep -c clang)
++ISCLANG = $(shell $(CC) --version | grep -c clang)
 +
 +ifeq ($(ISCLANG),1)
 +CFLAGS-insn-attrtab.o += -fbracket-depth=512