Fix T40025: install_deps.sh generating wrong make flag for OSL

Most cases should be handled OK now (not all though, would make script way too much tricky -
bash is a hell of a messy language :/).

build_files/build_environment/install_deps.sh

@@ -2943,6 +2943,8 @@ print_info() {
     _buildargs="$_buildargs $_1"
   fi
 
+  PRINT "$OSL_SKIP"
+  if [ "$OSL_SKIP" = false ]; then
     _1="-D WITH_CYCLES_OSL=ON"
     _2="-D WITH_LLVM=ON"
     _3="-D LLVM_VERSION=$LLVM_VERSION_FOUND"
@@ -2962,6 +2964,7 @@ print_info() {
       PRINT "  $_2"
       _buildargs="$_buildargs $_1 $_2"
     fi
+  fi
 
   if $WITH_OPENCOLLADA; then
     _1="-D WITH_OPENCOLLADA=ON"
@@ -2969,6 +2972,7 @@ print_info() {
     _buildargs="$_buildargs $_1"
   fi
 
+  if [ "$FFMPEG_SKIP" = false ]; then
     _1="-D WITH_CODEC_FFMPEG=ON"
     _2="-D FFMPEG_LIBRARIES='avformat;avcodec;avutil;avdevice;swscale;rt;`print_info_ffmpeglink`'"
     PRINT "  $_1"
@@ -2979,6 +2983,7 @@ print_info() {
       PRINT "  $_1"
       _buildargs="$_buildargs $_1"
     fi
+  fi
 
   PRINT ""
   PRINT "Or even simpler, just run (in your blender-source dir):"
@@ -2992,10 +2997,12 @@ print_info() {
     PRINT "BF_PYTHON_ABI_FLAGS = 'm'"
   fi
 
+  if [ "$OCIO_SKIP" = false ]; then
     PRINT "WITH_BF_OCIO = True"
     if [ -d $INST/ocio ]; then
       PRINT "BF_OCIO = '$INST/ocio'"
     fi
+  fi
 
   if [ -d $INST/openexr ]; then
     PRINT "BF_OPENEXR = '$INST/openexr'"
@@ -3012,10 +3019,12 @@ print_info() {
     PRINT "WITH_BF_STATICOPENEXR = True"
   fi
 
+  if [ "$OIIO_SKIP" = false ]; then
     PRINT "WITH_BF_OIIO = True"
     if [ -d $INST/oiio ]; then
       PRINT "BF_OIIO = '$INST/oiio'"
     fi
+  fi
 
   PRINT "WITH_BF_CYCLES = True"
 
@@ -3023,10 +3032,12 @@ print_info() {
     PRINT "BF_OSL = '$INST/osl'"
   fi
 
+  if [ "$BOOST_SKIP" = false ]; then
     PRINT "WITH_BF_BOOST = True"
     if [ -d $INST/boost ]; then
       PRINT "BF_BOOST = '$INST/boost'"
     fi
+  fi
 
   if $WITH_OPENCOLLADA; then
     PRINT "WITH_BF_COLLADA = True"
@@ -3035,13 +3046,15 @@ print_info() {
     fi
   fi
 
+  if [ "$FFMPEG_SKIP" = false ]; then
     _ffmpeg_list_sep=" "
     if [ -d $INST/ffmpeg ]; then
       PRINT "BF_FFMPEG = '$INST/ffmpeg'"
     fi
     PRINT "BF_FFMPEG_LIB = 'avformat avcodec swscale avutil avdevice `print_info_ffmpeglink`'"
+  fi
 
-  if ! $WITH_ALL; then
+  if [ "$WITH_ALL" = false ]; then
     PRINT "WITH_BF_3DMOUSE = False"
   # No libspacenav in official arch repos...
   elif [ "$DISTRO" = "ARCH" ]; then