ENH: improve foamConfigurePaths, remove some antiquated tools

- add edit of llvm/mesa/vtk paths. Reduce some verbosity

- include Darwin in foamInstallationTest, foamSystemCheck to avoid
  a false negative.

bin/tools/lib-dir

@@ -22,8 +22,14 @@
 #     LIBEXT if these failed. A DIR ending in "-none" or "-system" is skipped.
 #
 #     output -csh:     setenv LD_LIBRARY_PATH dir/lib:$LD_LIBRARY_PATH
-#     output -make:    -Ldir/lib
 #     output -sh:      LD_LIBRARY_PATH=dir/lib:$LD_LIBRARY_PATH
+#     output -make:    -Ldir/lib
+#
+# Note
+#     LD_LIBRARY_PATH automatically changes to DYLD_LIBRARY_PATH for Darwin.
+#
+# Environment
+#     WM_COMPILER_LIB_ARCH
 #
 #------------------------------------------------------------------------------
 printHelp() {
@@ -34,9 +40,9 @@ Usage: ${0##*/} [OPTION] DIR [LIBEXT]
 options:
   -sh               Emit POSIX shell syntax (default)
   -csh              Emit C-shell shell syntax
-  -sh-verbose       As per -sh,  with additional verbosity
-  -csh-verbose      As per -csh, with additional verbosity
-  -make             Emit content for a makefile
+  -sh-verbose       Like -sh,  with additional verbosity
+  -csh-verbose      Like -csh, with additional verbosity
+  -make             Emit content for a Makefile
   -help             Print the usage
 
 Resolves for the existence of DIR/lib64 and DIR/lib, or uses the fallback
@@ -139,10 +145,10 @@ then
     # Fallback
     case "$alt" in
     /*)
-        resolved=$alt
+        resolved="$alt"
         ;;
     (*)
-        resolved=$dir/$alt
+        resolved="$dir/$alt"
         ;;
     esac
     exit 0
@@ -177,6 +183,7 @@ then
         fi
         ;;
     *)
+        # Default is -sh
         echo "LD_LIBRARY_PATH=$resolved:$LD_LIBRARY_PATH"
         if [ -n "$verboseOutput" ]
         then