(Ugh. Last checkin was supposed to have been aborted. Oops.)

Replace elf-offset.ld with a version we can ship.
Use "-T" in linker invocation when specifying linker script.

ld/testsuite/ld-shared/.Sanitize

@@ -23,6 +23,7 @@ Do-first:
 
 Things-to-keep:
 
+elf-offset.ld
 main.c
 sh1.c
 sh2.c
@@ -33,8 +34,6 @@ xcoff.dat
 
 Things-to-lose:
 
-elf-offset.ld
-
 # The lines between the "Do-last:" line and the end of the file
 # are executed as a /bin/sh shell script after everything else is
 # done.