prs: use the PRServer to replace the BB_URI_LOCALCOUNT functionality

- adapt the PRServer to generate an incremental number for every revision set
associated with a (PN, PV)
- use one incrementing value rather than several
- PV becomes 0.1+gitAUTOINC+deadbeefdecafbad_decafbaddeadbeef
- if PV contains 'AUTOINC' set PKGV to the same thing with AUTOINC replaced
with the "auto PR" value
- if the PRServer isn't running replace AUTOINC with 0 (no package feeds, but usual
image creation would work)
- use the PR table with "AUTOINC-${PV-without-SRCREVs}" as key
- modify prexport/primport to address the generated srcrev entries
- this patch addresses the following proposal:
http://lists.linuxtogo.org/pipermail/bitbake-devel/2012-November/003878.html

(From OE-Core rev: b27b438221e16ac3df6ac66d761b77e3bd43db67)

Signed-off-by: Constantin Musca <constantinx.musca@intel.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/package.bbclass

@@ -411,6 +411,10 @@ python package_get_auto_pr() {
                 bb.fatal("Can NOT get PRAUTO from remote PR service")
             return
         d.setVar('PRAUTO',str(auto_pr))
+    else:
+        pv = d.getVar("PV", True)
+        if 'AUTOINC' in pv:
+            d.setVar("PKGV", pv.replace("AUTOINC", "0"))
 }
 
 LOCALEBASEPN ??= "${PN}"