Review Request: 8005549: build-infra: Merge NewMakefile.gmk and common/makefiles/Makefile

[Erik Joelsson]

Merged NewMakefile.gmk and common/makefiles/Makefile and removed 
redundant functionality.

* The bridgebuild and jprt specific stuff was moved to a separate file 
common/makefiles/Jprt.gmk.
* Default targets changed a bit. Default is basically what it was "jdk". 
There is a new "all" target which behaves differently depending on if 
closed is present. For open this build images and docs. If closed is 
present it currently adds deploy. Will move to install when we have full 
support for it.
* Made custom-hook.m4 less picky with --with-java-devtools option. Use 
it as a default rather than fail when something isn't found using it. 
This makes it more usable with bridgebuild.
* Removed macosx specific bundles target since it conflicted with jprt 
bundles target. Macosx bundles will just get built with images instead, 
like in the old build.

http://cr.openjdk.java.net/~erikj/8005549/webrev.root.01/
http://cr.openjdk.java.net/~erikj/8005549/webrev.jdk.01/