RFR: JDK-8173107 Fix autoconf/spec.gmk mismatches

Fri Jan 20 08:58:24 UTC 2017

Over the course of jdk9 development, the variables in the configure 
script exported using AC_SUBST, the replacement patterns in spec.gmk.in 
and the usage of spec.gmk in the makefiles have diverged.

Fixes:

* Remove AC_SUBST for variables not exported or not used in make files. 
(BOOT_JDK_BITS, ZERO_ARCHFLAG, ZERO_ARCHDEF, INCLUDE_DTRACE, 
OPENJDK_*_OS_BUNDLE, OPENJDK_*_CPU_BUNDLE, LP64, ENABLE_JFR)
* Include missing exports in spec.gmk.in (JDK_ARCH_ABI_PROP_NAME)
* Make sure we always explicitly use AC_SUBST for exported variables 
(PNG_CFLAGS, PNG_LIBS, LCMS_CFLAGS, LCMS_LIBS)
* Only use the pattern AC_SUBST(VARIABLE), to make sure the VARIABLE is 
accessible in configure as well as make.

Bug: https://bugs.openjdk.java.net/browse/JDK-8173107
WebRev: 
http://cr.openjdk.java.net/~ihse/JDK-8173107-fix-spec-gmk-mismatches/webrev.01

/Magnus