CVS psmith make: Add support for broken SA_RESTART on PTX.

CVSROOT:        /cvsroot/make
Module name:    make
Changes by:     psmith  02/09/10 03:27:29

Modified files:
        .              : ChangeLog configure.in make.h misc.c read.c 
        doc            : make.texi 
        tests          : ChangeLog 
        tests/scripts/features: conditionals 
Added files:
        tests/scripts/features: export 

Log message:
Add support for broken SA_RESTART on PTX.
Fix bug #103: allow ifdef, export, and unexport to expand their arguments.