metadata: make srcpackage extensible

Turn the srcpackage values into hashes to allow storing more information
than just binary package names.

Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>

scripts/feeds

@@ -525,7 +525,7 @@ sub install_package {
 	};
 
 	# install all dependencies referenced from the source package
-	foreach my $vpkg (@{$feed_src->{$src}}) {
+	foreach my $vpkg (@{$feed_src->{$src}{packages}}) {
 		foreach my $dep (@{$vpkg->{depends}}, @{$vpkg->{builddepends}}, @{$vpkg->{"builddepends/host"}}) {
 			next if $dep =~ /@/;
 			$dep =~ s/^\+//;

scripts/metadata.pm

@@ -212,7 +212,9 @@ sub parse_package_metadata($) {
 			$src = $3;
 			$subdir =~ s/^package\///;
 			$subdir{$src} = $subdir;
-			$srcpackage{$src} = [];
+			$srcpackage{$src} = {
+				packages => [],
+			};
 			$override = "";
 			undef $pkg;
 		};
@@ -237,7 +239,7 @@ sub parse_package_metadata($) {
 			$pkg->{tristate} = 1;
 			$pkg->{override} = $override;
 			$package{$1} = $pkg;
-			push @{$srcpackage{$src}}, $pkg;
+			push @{$srcpackage{$src}{packages}}, $pkg;
 		};
 		/^Feature:\s*(.+?)\s*$/ and do {
 			undef $pkg;

scripts/package-metadata.pl

@@ -445,7 +445,7 @@ sub gen_package_mk() {
 			print "buildtypes-$pkg->{subdir}$pkg->{src} = ".join(' ', @{$pkg->{buildtypes}})."\n";
 		}
 
-		foreach my $spkg (@{$srcpackage{$pkg->{src}}}) {
+		foreach my $spkg (@{$srcpackage{$pkg->{src}}{packages}}) {
 			foreach my $dep (@{$spkg->{depends}}, @{$spkg->{builddepends}}) {
 				$dep =~ /@/ or do {
 					$dep =~ s/\+//g;