libxml2: make it so most includes just work (#435)

* make it so most includes just work

* work out cleaning properly

* back to @main

---------

Co-authored-by: Jacob Heider <jacob@tea.xyz>

projects/gnome.org/libxml2/package.yml

@@ -17,6 +17,12 @@ build:
     cd {{prefix}}/bin
     sed -i.bak 's|{{prefix}}|"$(cd "$(dirname "$0")/.." \&\& pwd)"|' xml2-config
     rm *.bak
+
+    # a lot of stuff is surprised at the libxml2 prefix
+    cd {{prefix}}/include
+    mv libxml2/libxml .
+    rmdir libxml2
+    ln -s . libxml2
   env:
     ARGS:
       - --prefix={{prefix}}