Fix build problem caused by having spaces in the username.

Bug #137059 r=dmose r=mcs

configure

@@ -2878,7 +2878,7 @@ else
   echo "$ac_t""no" 1>&6
 fi
 
-for ac_prog in gawk mawk nawk awk
+for ac_prog in mawk gawk nawk awk
 do
 # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -11603,7 +11603,7 @@ MOZ_DEBUG_ENABLE_DEFS="-DDEBUG -D_DEBUG"
         MOZ_DEBUG_ENABLE_DEFS="$MOZ_DEBUG_ENABLE_DEFS -DDEBUG_${USER}"
         ;;
     msvc*|mksnt*|cygwin*|mingw*)
-        MOZ_DEBUG_ENABLE_DEFS="$MOZ_DEBUG_ENABLE_DEFS -DDEBUG_${USERNAME}"
+        MOZ_DEBUG_ENABLE_DEFS="$MOZ_DEBUG_ENABLE_DEFS -DDEBUG_`echo ${USERNAME} | sed -e 's| |_|g'`"
         ;;
     *) 
         MOZ_DEBUG_ENABLE_DEFS="$MOZ_DEBUG_ENABLE_DEFS -DDEBUG_`$WHOAMI`"

configure.in

@@ -3487,7 +3487,7 @@ MOZ_DEBUG_ENABLE_DEFS="-DDEBUG -D_DEBUG"
         MOZ_DEBUG_ENABLE_DEFS="$MOZ_DEBUG_ENABLE_DEFS -DDEBUG_${USER}"
         ;;
     msvc*|mksnt*|cygwin*|mingw*)
-        MOZ_DEBUG_ENABLE_DEFS="$MOZ_DEBUG_ENABLE_DEFS -DDEBUG_${USERNAME}"
+        MOZ_DEBUG_ENABLE_DEFS="$MOZ_DEBUG_ENABLE_DEFS -DDEBUG_`echo ${USERNAME} | sed -e 's| |_|g'`"
         ;;
     *) 
         MOZ_DEBUG_ENABLE_DEFS="$MOZ_DEBUG_ENABLE_DEFS -DDEBUG_`$WHOAMI`"