Search: do not use libobject to find variables
Search: do not use libobject to find variables

In preparation for removing the VARIABLE object.

It seems this doesn't change the output tests.

coq/coq,gares/coq,coq/coq,SkySkimmer/coq,ejgallego/coq,JasonGross/coq,Zimmi48/coq,SkySkimmer/coq,Zimmi48/coq,SkySkimmer/coq,gares/coq,JasonGross/coq,JasonGross/coq,gares/coq,Zimmi48/coq,gares/coq,Matafou/coq,silene/coq,SkySkimmer/coq,Matafou/coq,coq/coq,Zimmi48/coq,Matafou/coq,silene/coq,coq/coq,ejgallego/coq,JasonGross/coq,ejgallego/coq,gares/coq,ejgallego/coq,silene/coq