hg: jdk9/client/jdk: 8074827: Resolve disabled warnings for libjavajpeg

[philip.race at oracle.com]

Changeset: d4f7412a51d2
Author:    prr
Date:      2016-07-26 11:30 -0700
URL:       http://hg.openjdk.java.net/jdk9/client/jdk/rev/d4f7412a51d2

8074827: Resolve disabled warnings for libjavajpeg
Reviewed-by: serb, psadhukhan

! make/lib/Awt2dLibraries.gmk
! src/java.desktop/share/native/libjavajpeg/imageioJPEG.c
! src/java.desktop/share/native/libjavajpeg/jpegdecoder.c