package-dumpinfo,metadata: add ABI version information to package index

There is no standard for ABI versioning, so its not possible to find out
from `libext2fs2`, `libiwinfo20230701` or `libss2` package names if
thats just package name or package name with ABI version included. To
help with the decision, lets make ABI version aviable in package index.

Signed-off-by: Petr Štetiar <ynezz@true.cz>
(cherry picked from commit 649655f)

include/package-dumpinfo.mk

@@ -37,6 +37,7 @@ $(if $(USERID),Require-User: $(USERID)
 $(if $(LICENSE),License: $(LICENSE)
 )$(if $(LICENSE_FILES),LicenseFiles: $(LICENSE_FILES)
 )$(if $(PKG_CPE_ID),CPE-ID: $(PKG_CPE_ID)
+)$(if $(ABI_VERSION),ABI-Version: $(ABI_VERSION)
 )Type: $(if $(Package/$(1)/targets),$(Package/$(1)/targets),$(if $(PKG_TARGETS),$(PKG_TARGETS),ipkg))
 $(if $(KCONFIG),Kernel-Config: $(KCONFIG)
 )$(if $(BUILDONLY),Build-Only: $(BUILDONLY)

scripts/metadata.pm

@@ -257,6 +257,7 @@ sub parse_package_metadata($) {
 		/^License: \s*(.+)\s*$/ and $pkg->{license} = $1;
 		/^LicenseFiles: \s*(.+)\s*$/ and $pkg->{licensefiles} = $1;
 		/^CPE-ID: \s*(.+)\s*$/ and $pkg->{cpe_id} = $1;
+		/^ABI-Version: \s*(.+)\s*$/ and $pkg->{abi_version} = $1;
 		/^Default: \s*(.+)\s*$/ and $pkg->{default} = $1;
 		/^Provides: \s*(.+)\s*$/ and do {
 			my @vpkg = split /\s+/, $1;