[oe] MACHINE_KERNEL_PR overrides PR for modules

[Denis Dydychkin]

When recipe inherits module.bbclass, it will get its PR overwritten if
MACHINE_KERNEL_PR is defined. The outcome is that bumping PR within recipe has
no effect, as well as SRCREV does not work anymore, which is especially
important when working with latest version from repos.

The following patch fixes this problem by appending MACHINE_KERNEL_PR to PR
instead of replacing it. "+k" is added to get resulting PR looks like "r1+kr22"
or "r1+svnr222+kr33" since MACHINE_KERNEL_PR is usually defined as "rXX".


--- classes/module-base.bbclass 2011-02-17 16:14:45.792425264 +0300
+++ classes/module-base.bbclass 2011-02-17 16:36:00.088425246 +0300
@@ -11,7 +11,8 @@
     machine_kernel_pr = bb.data.getVar('MACHINE_KERNEL_PR', d, True)

     if machine_kernel_pr:
-       bb.data.setVar('PR', machine_kernel_pr, d)
+       pr = bb.data.getVar('PR', d, True) + "+k" + machine_kernel_pr
+       bb.data.setVar('PR', pr, d)
 }

 export KERNEL_VERSION = "${@base_read_file('${STAGING_KERNEL_DIR}/kernel-abiversion')}"