File gpc-fix_docpath.patch of Package gcc3

--- p/Make-lang.in.orig	2012-05-02 11:55:07.000000000 +0100
+++ p/Make-lang.in	2012-05-02 11:55:51.000000000 +0100
@@ -163,7 +163,7 @@
 PASCAL_INSTALL_DOC=pascal.real-install-doc
 
 # Where to install the documentation and demos (relative to the prefix)
-P_DOC_DIR=doc/gpc
+P_DOC_DIR=gpc
 p_inst_docdir=$(prefix)/$(P_DOC_DIR)
 p_inst_demodir=$(p_inst_docdir)/demos
 p_inst_docdemodir=$(p_inst_docdir)/docdemos