RFR: JDK-8171932: unresolved macro in javadoc command

[Erik Joelsson]

Hello,

In the new Javadoc.gmk, there is a problem with a make variable, 
$(HASH), that doesn't get resolved properly into # in the final html 
files. My conclusion is that the # character is problematic when being 
passed inside an argument to one of our named parameter macros. I have 
fixed this by always escaping any # characters in the input parameters 
to these macros. With this fix, the html files come out with the correct 
# and the background color of the snippet looks correct.

Bug: https://bugs.openjdk.java.net/browse/JDK-8171932

Webrev: http://cr.openjdk.java.net/~erikj/8171932/webrev.01/

/Erik