build-sys: Update tests to new binary locations

testsuite/pgrep.test/pgrep.exp

@@ -3,12 +3,12 @@
 #
 set mypid [pid]
 set not_ppid [ expr { $mypid + 1 } ]
-set pgrep "${topdir}pgrep"
+set pgrep "${topdir}src/pgrep"
 set uid [ exec id -u ]
 set not_uid [ expr { $uid + 1 } ] 
 set gid [ exec id -g ]
 set not_gid [ expr { $gid + 1 } ] 
-set ps "${topdir}ps/pscommand"
+set ps "${topdir}src/ps/pscommand"
 set tty [ get_tty ]
 
 set test "pgprep with no arguments"