Fix issues in j.l.i package info

lava.lang.instrument package info (src/java.instrument/share/classes/java/lang/instrument/package-info.java) says:
====
 * Provides services that allow Java programming language agents to instrument
 * programs running on the JVM. The mechanism for instrumentation is modification
 * of the byte-codes of methods.
 *
 * <p> Note: developers/admininstrators are responsible for verifying
 * the trustworthiness of content and structure of the Java Agents they deploy,
 * since those are able to arbitrarily transform the bytecode from other JAR files.
 * Since that happens after the Jars containing the bytecode have been verified
 * as trusted, the trustworthiness of a Java Agent can determine the trust towards
 * the entire program.
 *
 * <p> An agent is deployed as a JAR file. An attribute in the JAR file manifest
====

i.e. note about content of the jar file precedes info that agents are deployed as JAR files.

Also need to make consistent "JAR"/"Jar"