testlab: match Package,Version,Archi,Depends,Recom only as first word on line

testlab: match Package,Version,Archi,Depends,Recom only as first word on line

* otherwise it will pick 'The' ie from line 'Description: The Enlightenment Window Manager Version 17' and mess installed-packages.txt
  fails: Version_shr-version_1.0-20100512-r0.4_om-gta02.ipk
  fails: The_e-wm_0.16.999.060+svnr48617-r13.4_armv4t.ipk
* this is also fix for missing entries in installed-package-sizes.txt
  (when find cannot find ipk files for messed package names)

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>