Merge outstanding 1.33 changes to trunk:

* QNX/qcc support.
* STLport5 support.
* STLport support docs cleanup.
* kFreeBSD support.
* MinGW/MSYS support.


[SVN r31345]

tools/build

@@ -1 +1 @@
-Subproject commit a7364303893eca928992002c17fc81bbe2a8cb07
+Subproject commit 39d07df796f618fbb5ce877faa05eef8aede82d6