Fix invalid DTS includes

Fixes the following build errors:

> Error: arch/arm/dts/.rk3036-sdk.dtb.pre.tmp:77.1-10 syntax error
> Error: arch/arm/dts/.rk3188-radxarock.dtb.pre.tmp:383.1-10 syntax error

The generated DTS had `\#include` instead of `#include`

Signed-off-by: Gleb Mazovetskiy <glex.spb@gmail.com>

Author: glebm

tools/Makefile

@@ -216,7 +216,7 @@ HOSTCFLAGS_sha1.o := -pedantic
 HOSTCFLAGS_sha256.o := -pedantic
 
 quiet_cmd_wrap = WRAP    $@
-cmd_wrap = echo "\#include <../$(patsubst $(obj)/%,%,$@)>" >$@
+cmd_wrap = echo \#"include <../$(patsubst $(obj)/%,%,$@)>" >$@
 
 $(obj)/lib/%.c $(obj)/common/%.c $(obj)/env/%.c:
 	$(call cmd,wrap)