Revert "Merge pull request #36 from MentorEmbedded/sb-1905"

This reverts commit f901bfd098, reversing
changes made to 69d2f98eda.

cs-license & friends don't obey TMPDIR, so this workaround had no useful
effect for our builds.

conf/distro/include/tcmode-external-sourcery.inc

@@ -156,23 +156,17 @@ def populate_toolchain_links(d):
     if not files:
         bb.fatal("Unable to populate toolchain binary symlinks in %s" % pattern)
 
-
-    origenv = d.getVar('BB_ORIGENV', False)
-    logname = origenv.get('LOGNAME', 'unknown')
-    tmpdir = os.path.join(origenv.get('TMPDIR', '/tmp'), 'sourcery-%s' % logname)
-    bb.utils.mkdirhier(tmpdir)
-
     bindir = d.getVar('STAGING_BINDIR_TOOLCHAIN', True)
     bb.utils.mkdirhier(bindir)
     for f in files:
         base = os.path.basename(f)
         newpath = os.path.join(bindir, base)
-        if not os.path.exists(newpath):
-            with open(newpath, 'w') as new:
-                new.write('#!/bin/sh\n')
-                new.write('export TMPDIR="{0}"\n'.format(tmpdir))
-                new.write('exec "{0}" "$@"\n'.format(f))
-                os.fchmod(new.fileno(), 0755)
+        try:
+            os.symlink(f, newpath)
+        except OSError as exc:
+            if exc.errno == errno.EEXIST:
+                break
+            bb.fatal("Unable to populate toolchain binary symlink for %s: %s" % (newpath, exc))
 
     # Ensure that we have a ld.bfd available, now that KERNEL_LD uses it
     ld = d.expand('${TARGET_PREFIX}ld')