RFR: JDK-8001922, JDK-8001927, JDK-8001921 Improve freetype detection

Fri Oct 18 12:59:26 UTC 2013

Bug: https://bugs.openjdk.java.net/browse/JDK-8001922
Bug: https://bugs.openjdk.java.net/browse/JDK-8001927
Bug: https://bugs.openjdk.java.net/browse/JDK-8001921

These three bugs are all tightly related. The logic for detecting the 
freetype library has been really messy, and these were three of the ways 
the deficiencies showed themselves, but they were all resulting from the 
core problem.

I have redesigned the way freetype detection work, to be more in line 
with the normal way we detect "problematic" stuff in configure, that is, 
probe in suitable locations with decreasing precision, and check 
thouroughly what we find. (In this case, by compiling with the header 
files and linking with the library).

WebRev: 
http://cr.openjdk.java.net/~ihse/JDK-8001922-improve-freetype-detection/webrev.01

/Magnus