[11u] RFR: 8249821: Separate libharfbuzz from libfontmanager

[Lindenmaier, Goetz]

Hi,

I downport this for parity with 11.0.10-oracle. 

I had to fix a row of things in the makefile.
 - some utility functions are missing in the 11 build
 - I implemented the solaris build. I checked Solaris sparc works.

The rest is just a plain file move, except for adding a const
in hb_subset_cff_common.hh  hb_serialize_cff_fdselect().
The implementation in .cc declares the argument const, and 
solaris fails to link without seeing the const in the header.

http://cr.openjdk.java.net/~goetz/wr20/8249821-separate_harfbuzz-jdk11/01/

Please review.

https://bugs.openjdk.java.net/browse/JDK-8249821
https://hg.openjdk.java.net/jdk/client/rev/cda47533b1ee

Best regards,
  Goetz.