zlib: bump version

Patch is now upstream.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/zlib/zlib-1.2.5-fix-static-install.patch

@@ -1,24 +0,0 @@
-[PATCH] fix make install for static builds
-
-Only try to install shared lib if we've built one.
-
-Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
----
- Makefile.in |    4 +++-
- 1 file changed, 3 insertions(+), 1 deletion(-)
-
-Index: zlib-1.2.5/Makefile.in
-===================================================================
---- zlib-1.2.5.orig/Makefile.in
-+++ zlib-1.2.5/Makefile.in
-@@ -168,7 +168,9 @@ install-libs: $(LIBS)
- 	-@if [ ! -d $(DESTDIR)$(man3dir)      ]; then mkdir -p $(DESTDIR)$(man3dir); fi
- 	-@if [ ! -d $(DESTDIR)$(pkgconfigdir) ]; then mkdir -p $(DESTDIR)$(pkgconfigdir); fi
- 	cp $(STATICLIB) $(DESTDIR)$(libdir)
--	cp $(SHAREDLIBV) $(DESTDIR)$(sharedlibdir)
-+	if test "$(SHAREDLIBV)" -a -f $(SHAREDLIBV); then \
-+	  cp $(SHAREDLIBV) $(DESTDIR)$(sharedlibdir); \
-+	fi
- 	cd $(DESTDIR)$(libdir); chmod u=rw,go=r $(STATICLIB)
- 	-@(cd $(DESTDIR)$(libdir); $(RANLIB) libz.a || true) >/dev/null 2>&1
- 	-@cd $(DESTDIR)$(sharedlibdir); if test "$(SHAREDLIBV)" -a -f $(SHAREDLIBV); then \

package/zlib/zlib.mk

@@ -3,10 +3,11 @@
 # zlib
 #
 #############################################################
-ZLIB_VERSION:=1.2.5
-ZLIB_SOURCE:=zlib-$(ZLIB_VERSION).tar.bz2
-ZLIB_SITE:=http://$(BR2_SOURCEFORGE_MIRROR).dl.sourceforge.net/sourceforge/libpng
-ZLIB_INSTALL_STAGING=YES
+
+ZLIB_VERSION = 1.2.6
+ZLIB_SOURCE =zlib-$(ZLIB_VERSION).tar.bz2
+ZLIB_SITE = http://$(BR2_SOURCEFORGE_MIRROR).dl.sourceforge.net/sourceforge/libpng
+ZLIB_INSTALL_STAGING = YES
 
 ifeq ($(BR2_PREFER_STATIC_LIB),y)
 ZLIB_PIC :=