STYLE: update some instructions in makeLLVM

makeCmake

@@ -58,11 +58,11 @@ options:
 USAGE
     exit 1
 }
+#------------------------------------------------------------------------------
 
-# ensure CMake gets the correct C++ compiler
+# ensure CMake gets the correct /CC++ compiler
+[ -n "$WM_CC" ]  && export CC="$WM_CC"
 [ -n "$WM_CXX" ] && export CXX="$WM_CXX"
-[ -n "$WM_CC" ] && export CC="$WM_CC"
-
 
 # parse options
 while [ "$#" -gt 0 ]
@@ -72,8 +72,8 @@ do
         usage
         ;;
     -gcc)
-        export CC=gcc   # use gcc
-        export CXX=g++  # use g++
+        export CC=gcc   # use gcc/g++
+        export CXX=g++
         ;;
     cmake-[1-9]*)
         cmakePACKAGE="${1%%/}"