src/parallel/decompose: Remove dependency on "SCOTCH_ROOT" and repair "decompose/Allwclean"

Patch contributed by Bruno Santos
Resolves patch request http://bugs.openfoam.org/view.php?id=2212

src/parallel/decompose/Allwclean

@@ -1,9 +1,6 @@
 #!/bin/sh
 cd ${0%/*} || exit 1    # Run from this directory
 
-# Parse arguments for library compilation
-. $WM_PROJECT_DIR/wmake/scripts/AllwmakeParseArguments
-
 # get SCOTCH_VERSION, SCOTCH_ARCH_PATH
 if settings=`$WM_PROJECT_DIR/bin/foamEtcFile config.sh/scotch`
 then
@@ -28,7 +25,7 @@ wcleanMpiLib()
         WM_OPTIONS="$WM_OPTIONS$WM_MPLIB"
         whichmpi="$WM_PROJECT_DIR/platforms/$WM_OPTIONS/src/parallel/decompose/$libName/using:$FOAM_MPI"
         whichscotch="$WM_PROJECT_DIR/platforms/$WM_OPTIONS/src/parallel/decompose/$libName/using:$SCOTCH_VERSION"
-        wclean $targetType $libName
+        wclean $libName
     )
     done
     set -x

src/parallel/decompose/ptscotchDecomp/Make/options

@@ -3,10 +3,15 @@ sinclude $(RULES)/mplib$(WM_MPLIB)
 
 EXE_INC = \
     $(PFLAGS) $(PINC) \
-    -I$(SCOTCH_ROOT)/include \
     -I$(SCOTCH_ARCH_PATH)/include/$(FOAM_MPI) \
+    -I$(SCOTCH_ARCH_PATH)/include \
     -I/usr/include/scotch \
     -I../decompositionMethods/lnInclude
 
 LIB_LIBS = \
-    -L$(SCOTCH_ROOT)/lib -L$(FOAM_EXT_LIBBIN)/$(FOAM_MPI) -lptscotch -lptscotcherrexit -lscotch ${LINK_FLAGS} -lrt
+    -L$(SCOTCH_ARCH_PATH)/lib \
+    -L$(FOAM_EXT_LIBBIN)/$(FOAM_MPI) \
+    -lptscotch \
+    -lptscotcherrexit \
+    -lscotch \
+    -lrt

src/parallel/decompose/scotchDecomp/Make/options

@@ -7,10 +7,13 @@ sinclude $(RULES)/mplib$(WM_MPLIB)
 
 EXE_INC = \
     $(PFLAGS) $(PINC) \
-    -I$(SCOTCH_ROOT)/include \
     -I$(SCOTCH_ARCH_PATH)/include \
     -I/usr/include/scotch \
     -I../decompositionMethods/lnInclude
 
 LIB_LIBS = \
-    -L$(SCOTCH_ROOT)/lib -L$(FOAM_EXT_LIBBIN) -lscotch -lscotcherrexit -lrt
+    -L$(SCOTCH_ARCH_PATH)/lib \
+    -L$(FOAM_EXT_LIBBIN) \
+    -lscotch \
+    -lscotcherrexit \
+    -lrt