[8u-dev] Request for approval: 8031759: Configure should handle overrides of tools better

[Kevin Walls]

Hi,

I'd like to request approval to backport to jdk8u:

8031759: Configure should handle overrides of tools better
JBS: https://bugs.openjdk.java.net/browse/JDK-8031759
9 changeset: http://hg.openjdk.java.net/jdk9/jdk9/rev/82b65f34b79d

8u webrev:
http://cr.openjdk.java.net/~kevinw/8031759/webrev.00/

This is mostly straightforward, large parts import cleanly, the parts 
that didn't are changes to macro names,  and a couple of tools 
referenced in the 9 change which are not in 8u (OTOOL and LIPO).

Also need to take into account this change (avoid creating this problem) :
8033115: Bad merge between 8027584 and 8031759
https://bugs.openjdk.java.net/browse/JDK-8033115

Which is just this edit in common/autoconf/build-performance.m4, 
included here in the proposed 8u push.
-    BASIC_REQUIRE_PROG(CCACHE, ccache)
+    BASIC_REQUIRE_PROGS(CCACHE, ccache)

(I can mark that bug as not present in 8 when done)

Then with the .m4 changes in place, ran common/autoconf/autogen.sh to 
recreate common/autoconf/generated-configure.sh which is included in the 
webrev/change.

Thanks!
Kevin