valgrind: Update to version 3.16.1

No special changes, just get in sync with recent code.
See here for the changelog:
https://valgrind.org/docs/manual/dist.news.html

The ipkg sizes changes as follows for mips 24kc :
	3.15   : valgrind_3.15.0-2_mips_24kc.ipk 1450680
	3.16.1 : valgrind_3.16.1-1_mips_24kc.ipk 1491954

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

package/devel/valgrind/Makefile

@@ -8,12 +8,12 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=valgrind
-PKG_VERSION:=3.15.0
-PKG_RELEASE:=2
+PKG_VERSION:=3.16.1
+PKG_RELEASE:=1
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
 PKG_SOURCE_URL:=http://sourceware.org/pub/valgrind/
-PKG_HASH:=417c7a9da8f60dd05698b3a7bc6002e4ef996f14c13f0ff96679a16873e78ab1
+PKG_HASH:=c91f3a2f7b02db0f3bc99479861656154d241d2fdb265614ba918cc6720a33ca
 
 PKG_MAINTAINER:=Felix Fietkau <nbd@nbd.name>
 PKG_LICENSE:=GPL-2.0+

package/devel/valgrind/patches/100-fix_configure_check.patch

@@ -1,6 +1,6 @@
 --- a/configure.ac
 +++ b/configure.ac
-@@ -341,7 +341,7 @@ case "${host_os}" in
+@@ -345,7 +345,7 @@ case "${host_os}" in
          # Ok, this is linux. Check the kernel version
          AC_MSG_CHECKING([for the kernel version])