RFR: JDK-8149545: Add zlib devel package to devkit sysroot on Linux

[Erik Joelsson]

In JDK-8031767, the default for zlib is being changed to system. To 
support that in our builds at Oracle, we need to add zlib devel package 
to the sysroots of our devkit.

While editing and regenerating the devkit, I noticed that one of the 
elfutils packages was missing from the makefile so added that too.

Bug: https://bugs.openjdk.java.net/browse/JDK-8149545
Patch:
diff --git a/make/devkit/Tools.gmk b/make/devkit/Tools.gmk
--- a/make/devkit/Tools.gmk
+++ b/make/devkit/Tools.gmk
@@ -83,8 +83,9 @@
      libXdmcp libXdmcp-devel \
      libXau libXau-devel \
      libgcc \
-    elfutils elfutils-devel \
-    elfutils-libelf elfutils-libelf-devel
+    elfutils elfutils-libs elfutils-devel \
+    elfutils-libelf elfutils-libelf-devel \
+    zlib zlib-devel


  ifeq ($(ARCH),x86_64)


/Erik