[RFR] [8u262] JDK-8248399: Build installs jfr binary when JFR is disabled

[Andrew Hughes]

Bug: https://bugs.openjdk.java.net/browse/JDK-8248399
Webrev: https://cr.openjdk.java.net/~andrew/openjdk8/8248399/webrev.01/

At present, the build still creates and installs a jfr binary even when
JFR is disabled. Without jfr.jar, it is useless:

$ ~/builder/8u/images/j2sdk-image/bin/jfr
Error: Could not find or load main class jdk.jfr.internal.tool.Main

The fix is a simple conditional around the jfr launcher, as was added
for the profiles in CopyFiles.gmk, but missed in the backport of
JDK-8205516.

This should go into 8u262 before freeze at end of today, so I'll flag
with jdk8u-critical-request once reviewed.

Thanks,
-- 
Andrew :)

Senior Free Java Software Engineer
Red Hat, Inc. (http://www.redhat.com)

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