[8u20] Request for approval for 3 Windows JNI correctness backports

[Phil Race]

Review thread :
http://mail.openjdk.java.net/pipermail/2d-dev/2014-April/004367.html

Bug details :-

Bug link:https://bugs.openjdk.java.net/browse/JDK-8035623
Synopsis: [parfait] JNI exception pending in
jdk/src/windows/native/sun/windows/awt_Font.cpp
9 changeset:http://hg.openjdk.java.net/jdk9/client/jdk/rev/ebb3e01cace5
8 backport :http://cr.openjdk.java.net/~prr/8035623.8u20/  <http://cr.openjdk.java.net/%7Eprr/8035623.8u20/>

Bug link:https://bugs.openjdk.java.net/browse/JDK-8037910
Synopsis: JNI warnings in
jdk/src/windows/native/sun/java2d/d3d/D3DSurfaceData.cpp
9 changeset:http://hg.openjdk.java.net/jdk9/client/jdk/rev/218ba3f17a70
8 backport :http://cr.openjdk.java.net/~prr/8037910.8u20/  <http://cr.openjdk.java.net/%7Eprr/8037910.8u20/>

Bug link:https://bugs.openjdk.java.net/browse/JDK-8035630
Synopsis: [parfait] JNI exception pending in
jdk/src/windows/native/sun/font/fontpath.c
9 changesets:http://hg.openjdk.java.net/jdk9/client/jdk/rev/453c97485189
9 changesets:http://hg.openjdk.java.net/jdk9/client/jdk/rev/ae1056458b47
8 backport :http://cr.openjdk.java.net/~prr/8035630.8u20/  <http://cr.openjdk.java.net/%7Eprr/8035630.8u20/>

-phil.