update_pch: add a bunch of pch files

 desktop:    1m51s ->   54s
 framework:  1m55s -> 1m04s
 package:      32s ->   16s
 sdext:      1m31s ->   47s
 svgio:        32s ->   15s
 uui:          49s ->   20s
 vbahelper:  1m44s ->   27s
 xmlscript:    15s ->   10s
 xmlsecurity:  45s ->   23s

Change-Id: Ia437969c091bf877983ababc5ea2d044bbc0bee0
sw: use ifndef

Change-Id: Ia74abd902bb2d40c6fe19d3c186fabfd559fb89d
connectivity: fix includes

Change-Id: I5d5dc6871789865189c78fe9135e7f8bff829489
cppuhelper: fix includes

Change-Id: I0e6bc822d19cf266dea716fe92f2ccd08d87c51f
update_pch: add a bunch of pch files

 connectivity: 3m52s ->  2m47s
 cppcanvas:      28s ->    13s
 cppuhelper:     20s ->    14s
 dbaccess:     2m38s ->  2m01s
 hwpfilter:      16s ->    13s
 sot:            21s ->    16s

Change-Id: I49286bfe6be73dd1b861be632b95e17a99e82f8a