Small updates to build scripts, refs #4419.

Tweak the coverage script.
Update the clean-workspaces script to be able to avoid rebuilding
libraries.

Differential Revision: https://code.wildfiregames.com/D2
This was SVN commit r19074.

build/coverage/gen.sh

@@ -1,16 +1,16 @@
-#!/bin/bash
+#!/bin/sh
 
 # Run "update-workspaces.sh --coverage" (in the appropriate directory) then
-# do "make test Collada", before running this script.
+# do "make test Collada config=debug", before running this script.
 # Also make sure you don't build via ccache. Also you might need a patch like
 # http://ltp.cvs.sourceforge.net/viewvc/ltp/utils/analysis/lcov/bin/lcov?r1=1.33&r2=1.34
 
 rm -f app.info
 
 for APPDIR in ../workspaces/gcc/obj/*; do
-  lcov -d $APPDIR --zerocounters
-  lcov -d $APPDIR -b ../workspaces/gcc --capture --initial -o temp.info
-  if [[ -e app.info ]]; then
+  lcov -d "$APPDIR" --zerocounters
+  lcov -d "$APPDIR" -b ../workspaces/gcc --capture --initial -o temp.info
+  if [ -e app.info ]; then
     lcov -a app.info -a temp.info -o app.info
   else
     mv temp.info app.info
@@ -20,12 +20,14 @@ done
 (cd ../../binaries/system/; ./test_dbg)
 
 for APPDIR in ../workspaces/gcc/obj/*; do
-  lcov -d $APPDIR -b ../workspaces/gcc --capture -o temp.info &&
+  lcov -d "$APPDIR" -b ../workspaces/gcc --capture -o temp.info &&
     lcov -a app.info -a temp.info -o app.info
 done
 
 lcov -r app.info '/usr/*' -o app.info
 lcov -r app.info '*/libraries/*' -o app.info
+lcov -r app.info '*/third_party/*' -o app.info
 
+rm -rf output
 mkdir output
 (cd output; genhtml ../app.info)