Fix some ldscripts/pr24008 fails

These targets were all failing due to extra symbols.
pdp11-dec-aout  +FAIL: ld-scripts/pr24008
powerpc-aix5.1  +FAIL: ld-scripts/pr24008
powerpc-aix5.2  +FAIL: ld-scripts/pr24008
rs6000-aix4.3.3  +FAIL: ld-scripts/pr24008
rs6000-aix5.1  +FAIL: ld-scripts/pr24008
rs6000-aix5.2  +FAIL: ld-scripts/pr24008

Some fails remain, those I saw were segfaults or assertion fails that
indicate target bugs.

	PR ld/24008
	* testsuite/ld-scripts/pr24008.d: Pass with extra target
	defined symbols.

ld/ChangeLog

@@ -1,3 +1,9 @@
+2019-02-06  Alan Modra  <amodra@gmail.com>
+
+	PR ld/24008
+	* testsuite/ld-scripts/pr24008.d: Pass with extra target
+	defined symbols.
+
 2019-02-05  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR ld/24151

ld/testsuite/ld-scripts/pr24008.d

@@ -4,5 +4,8 @@
 
 #...
 0+42 A defined
+#...
 0+42 A sym1
+#...
 0+43 A sym2
+#pass