LinkInstallZip breaks when jamming outside of HAIKU_TOP

[mmadia]

Currently ​PackageRules#L247's LinkInstallZip assumes `pwd` = $(HAIKU_TOP) = '.'

An example reproduction

cd <generated>
jam -qdadx haiku-ipw2100-cvs

The following improves the situation, but isn't a clean solution nor does it work when <generated> is a symlink.

Index: build/jam/PackageRules
===
 actions together LinkInstallZip
 {
-	ln -sf "`pwd`/$(2)" "$(1)" ;
+	if [ "$HAIKU_TOP" == '.' ]; then
+		ln -sf "`pwd`/$(2)" "$(1)" ; 
+	else
+		ln -sf "$(2)" "$(1)" ;
+	fi
+	
 }

[bonefish]

IMO the package rules should be removed completely and the Jamfiles be cleaned up. Their main purpose was to be able to build component installation packages for BeOS back when Haiku was far away from being usable.

[bonefish]

The rules have been removed.