hg: jdk/sandbox: 2 new changesets

[chris.hegarty at oracle.com]

Changeset: 23e7cd5a9c54
Author:    ihse
Date:      2018-09-18 10:29 +0200
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/23e7cd5a9c54

8210723: Better information in configure for invalid Xcode
Reviewed-by: erikj

! make/autoconf/toolchain.m4

Changeset: dd737bf6abde
Author:    ihse
Date:      2018-09-18 10:35 +0200
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/dd737bf6abde

8210750: Clean up compare.sh exceptions
Reviewed-by: erikj

! make/scripts/compare.sh
! make/scripts/compare_exceptions.sh.incl