Fixes make with -j, otherwise scotch.h may not be generated by the time make
tries to compile library_graph_diam.o et al.

Reported upstream at
https://gforge.inria.fr/tracker/index.php?func=detail&aid=21651&group_id=248&atid=1081

diff --git a/src/libscotch/Makefile b/src/libscotch/Makefile
index 9898894..b0ee14c 100644
--- a/src/libscotch/Makefile
+++ b/src/libscotch/Makefile
@@ -2229,6 +2229,28 @@ library_graph_color_f$(OBJ)	:	library_graph_color_f.c			\
 					common.h				\
 					scotch.h
 
+library_graph_diam$(OBJ)	:	library_graph_diam.c			\
+					module.h				\
+					common.h				\
+					graph.h					\
+					scotch.h
+
+library_graph_diam_f$(OBJ)	:	library_graph_diam.c			\
+					module.h				\
+					common.h				\
+					scotch.h
+
+library_graph_induce$(OBJ)	:	library_graph_diam.c			\
+					module.h				\
+					common.h				\
+					graph.h					\
+					scotch.h
+
+library_graph_induce_f$(OBJ)	:	library_graph_diam.c			\
+					module.h				\
+					common.h				\
+					scotch.h
+
 library_graph_io_chac$(OBJ)	:	library_graph_io_chac.c			\
 					module.h				\
 					common.h				\
874be3412aacd94634de74e1c70cd53'>refs</a><a class='active' href='/guix/log/d3.v3.js'>log</a><a href='/guix/tree/d3.v3.js?id=9b3e11f6a874be3412aacd94634de74e1c70cd53'>tree</a><a href='/guix/commit/d3.v3.js?id=9b3e11f6a874be3412aacd94634de74e1c70cd53'>commit</a><a href='/guix/diff/d3.v3.js?id=9b3e11f6a874be3412aacd94634de74e1c70cd53'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/d3.v3.js'>
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<div class='path'>path: <a href='/guix/log/?id=9b3e11f6a874be3412aacd94634de74e1c70cd53'>root</a>/<a href='/guix/log/d3.v3.js?id=9b3e11f6a874be3412aacd94634de74e1c70cd53'>d3.v3.js</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/d3.v3.js?id=9b3e11f6a874be3412aacd94634de74e1c70cd53&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2016-12-14 21:58:32 +0100'>2016-12-14</span></td><td><a href='/guix/commit/d3.v3.js?id=4d93f312f084c34a70cf7da3abe5f92a74d76861'>graph: Add d3js backend.</a><span class='msg-avail'>...</span></td><td>Ricardo Wurmus</td></tr>