Update nip4 to 9.0.15 (#85)

Author: jcupitt

build/nip4.mk

@@ -2,8 +2,8 @@ PKG             := nip4
 $(PKG)_WEBSITE  := https://github.com/jcupitt/nip4
 $(PKG)_DESCR    := Image processing spreadsheet
 $(PKG)_IGNORE   :=
-$(PKG)_VERSION  := 9.0.13-2
-$(PKG)_CHECKSUM := ab144b3702eb2376b58df9c39c9a53161e6960fea4c7c71eb5e5fd9cab9af1e1
+$(PKG)_VERSION  := 9.0.15
+$(PKG)_CHECKSUM := 25145902a5ef15ca1519c37556e2fb80c88b5b639a8656abfac3e17a62fafa22
 $(PKG)_PATCHES  := $(realpath $(sort $(wildcard $(dir $(lastword $(MAKEFILE_LIST)))/patches/$(PKG)-[0-9]*.patch)))
 $(PKG)_GH_CONF  := jcupitt/nip4/releases,v,,,,.tar.xz
 $(PKG)_SUBDIR   := $(PKG)-$(firstword $(subst -, ,$($(PKG)_VERSION)))