Don't run ld-scripts/pr20302 on linuxaout

	PR ld/20302
	* testsuite/ld-scripts/pr20302.d: Exclude *-*-*aout.

ld/ChangeLog

+2016-06-28  Alan Modra  <amodra@gmail.com>
+
+	PR ld/20302
+	* testsuite/ld-scripts/pr20302.d: Exclude *-*-*aout.
+
 2016-06-28  Maciej W. Rozycki  <macro@imgtec.com>
 
 	* testsuite/ld-mips-elf/mips16-branch-2.d: New test.

ld/testsuite/ld-scripts/pr20302.d

 #ld: -Tdata=0x1000 -Tdata=0x2000 -Tcross2.t
 #source: align2a.s
 #objdump: -h
-#notarget: rx-*-* *-*-aout *-*-netbsd x86_64-*-cygwin *-*-vms
+#notarget: rx-*-* *-*-*aout *-*-netbsd x86_64-*-cygwin *-*-vms
 # RX uses non standard section names.
 # AOUT and NETBSD  have fixed address for the data section.
 # x86_64 Cygwin biases all start addresses to be > 2Gb.