* Only print "@ phase..." messages on demand since they're kind of

ugly and we already print phases (with start and end markers).
* Remove some stray tabs.

svn path=/nixpkgs/branches/stdenv-updates/; revision=30059

pkgs/stdenv/generic/setup.sh

@@ -835,8 +835,10 @@ genericBuild() {
         if test "$curPhase" = fixupPhase -a -n "$dontFixup"; then continue; fi
         if test "$curPhase" = distPhase -a -z "$doDist"; then continue; fi
 
+        if [ -n "$tracePhases" ]; then
             echo
             echo "@ phase-started $out $curPhase"
+        fi
 
         showPhaseHeader "$curPhase"
         dumpVars
@@ -849,8 +851,10 @@ genericBuild() {
             cd "${sourceRoot:-.}"
         fi
         
+        if [ -n "$tracePhases" ]; then
             echo
             echo "@ phase-succeeded $out $curPhase"
+        fi
 
         stopNest
     done