zsh: fixing B!=S build issue

Provided correct path for gnu-configize, since It
is beeing executed in ${B} so It is not able to find
configure.ac

Signed-off-by: Raphael Silva <rapphil@gmail.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

meta-oe/recipes-extended/zsh/zsh.inc

@@ -8,8 +8,6 @@ SECTION = "base/shell"
 LICENSE = "zsh"
 LIC_FILES_CHKSUM = "file://LICENCE;md5=b7bc853894664be455a922db9805288e"
 
-PNBLACKLIST[zsh] ?= "BROKEN: doesn't build with B!=S (gnu-configize executed in ${B})"
-
 DEPENDS = "ncurses bison-native"
 
 SRC_URI = "${SOURCEFORGE_MIRROR}/${BPN}/${BP}.tar.gz"
@@ -38,7 +36,7 @@ ALTERNATIVE_PRIORITY = "100"
 export AUTOHEADER = "true"
 
 do_configure () {
-    gnu-configize --force
+    gnu-configize --force ${S}
     oe_runconf
 }