package_{ipk, deb, rpm}.bbclass: support additional user-defined metadata
Additional metadata from user-defined variable is written into
control/spec file of binary package.
Three variables are searched for adiitional package metadata:
* PACKAGE_ADD_METADATA_<PKGTYPE>_<PN>
* PACKAGE_ADD_METADATA_<PKGTYPE>
* PACKAGE_ADD_METADATA
First found variable with defined value wins.
<PN> is a package name. <PKGTYPE> is a distinct name of specific
package type:
* IPK for .ipk packages
* DEB for .deb packages
* RPM for .rpm packages
Variable can contain multiple [one-line] metadata fields separated by
literal sequence '\n'. Separator can be redefined through variable flag
'separator'. In package control/spec file separator is replaced by
newline character.
Signed-off-by: Leonid Borisenko <ive.found@gmail.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
