[PATCH] bitbake.conf: Remove horrible variable expansion hacks

[Richard Purdie <richard.purdie@linuxfoundation.org>]

We used to need these hacks to make things work. Rework the variables to 
remove the horrible hacks and make things slightly less ugly. This does
mean PE and PRAUTO are given default empty values but this is preferred
to the other ugliness.

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

diff --git a/meta/conf/bitbake.conf b/meta/conf/bitbake.conf
index fba4d17..7451eb8 100644
--- a/meta/conf/bitbake.conf
+++ b/meta/conf/bitbake.conf
@@ -189,17 +189,19 @@ ASSUME_PROVIDED = "\
 PN = "${@bb.parse.BBHandler.vars_from_file(d.getVar('FILE', False),d)[0] or 'defaultpkgname'}"
 PV = "${@bb.parse.BBHandler.vars_from_file(d.getVar('FILE', False),d)[1] or '1.0'}"
 PR = "${@bb.parse.BBHandler.vars_from_file(d.getVar('FILE', False),d)[2] or 'r0'}"
+PE = ""
 PF = "${PN}-${EXTENDPE}${PV}-${PR}"
-EXTENDPE = "${@['','${PE\x7d_'][int(d.getVar('PE', True) or 0) > 0]}"
+EXTENDPE = "${@['','${PE}_'][int(d.getVar('PE', True) or 0) > 0]}"
 P = "${PN}-${PV}"
 
-EXTENDPRAUTO = "${@['.${PRAUTO\x7d',''][d.getVar('PRAUTO', True) is None]}"
+PRAUTO = ""
+EXTENDPRAUTO = "${@['.${PRAUTO}', ''][not d.getVar('PRAUTO', True)]}"
 PRAUTOINX = "${PF}"
 
 PKGV ?= "${PV}"
 PKGR ?= "${PR}${EXTENDPRAUTO}"
-PKGE ?= "${@['','${PE\x7d'][int(d.getVar('PE', True) or 0) > 0]}"
-EXTENDPKGEVER = "${@['','${PKGE\x7d:'][d.getVar('PKGE', True).strip() != '']}"
+PKGE ?= "${@['','${PE}'][int(d.getVar('PE', True) or 0) > 0]}"
+EXTENDPKGEVER = "${@['','${PKGE}:'][d.getVar('PKGE', True).strip() != '']}"
 EXTENDPKGV ?= "${EXTENDPKGEVER}${PKGV}-${PKGR}"
 
 # Base package name