RFR: JDK-8185154: jdwp-protocol.html contains unescaped entities

[Jonathan Gibbons]

Please review a simple fix to escape use of the < character in HTML 
fragments in the JDWP spec.

In each case, the < is simply replaced by &lt;.
JBS: https://bugs.openjdk.java.net/browse/JDK-8185154
Webrev: 
http://cr.openjdk.java.net/~jjg/8185154/webrev.00/make/data/jdwp/jdwp.spec.sdiff.html

-- Jon