RFR: JDK-8199428: install-file macro fails on filenames with space on Solaris

[Erik Joelsson]

A while back I implemented support for handling filenames with space in 
them in the macros SetupCopyFiles and install-file. To verify this 
functionality I added tests to our test-make suite. These tests 
currently fail on Solaris. We currently don't use this functionality on 
Solaris, but keeping the tests passing is still preferable.

The problem is when using the $(@D) and $(@<) variants to extract the 
directory or filename of the target or source file in a recipe, we first 
need to EncodeSpace, as otherwise the ? seems to be evaluating before 
the implicit $(dir) or $(notdir) is called.

This patch adds those EncodeSpace calls and makes all the test-make 
tests pass on Solaris.

Bug: https://bugs.openjdk.java.net/browse/JDK-8199428

Webrev: http://cr.openjdk.java.net/~erikj/8199428/webrev.01/

/Erik