meta/scripts: Various getVar/getVarFlag expansion parameter fixes

There were a few straggling expansion parameter removals left for
getVar/getVarFlag where the odd whitespace meant they were missed
on previous passes. There were also some plain broken ussages such
as:

d.getVar('ALTERNATIVE_TARGET', old_name, True)
path = d.getVar('PATH', d, True)
d.getVar('IMAGE_ROOTFS', 'True')

which I've corrected (they happend to work by luck).

(From OE-Core rev: 688f7a64917a5ce5cbe12f8e5da4d47e265d240f)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/blacklist.bbclass

@@ -38,7 +38,7 @@ python blacklist_multilib_eventhandler() {
 }
 
 python () {
-    blacklist = d.getVarFlag('PNBLACKLIST', d.getVar('PN'), True)
+    blacklist = d.getVarFlag('PNBLACKLIST', d.getVar('PN'))
 
     if blacklist:
         raise bb.parse.SkipPackage("Recipe is blacklisted: %s" % (blacklist))