strace: fix lower case no to NO when setting STRACE_AUTORECONF

Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>

package/strace/strace.mk

@@ -6,7 +6,7 @@
 STRACE_VERSION:=4.5.18
 STRACE_SOURCE:=strace-$(STRACE_VERSION).tar.bz2
 STRACE_SITE:=http://$(BR2_SOURCEFORGE_MIRROR).dl.sourceforge.net/sourceforge/strace
-STRACE_AUTORECONF:=no
+STRACE_AUTORECONF:=NO
 STRACE_INSTALL_STAGING:=NO
 STRACE_INSTALL_TARGET:=YES