* made alloctemp more generic

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@24023 3ad0048d-3df7-0310-abae-a5850022a9f2
* let the character unit depend on buildcollations to prevent simultaneous
  building of unicodedata by two different units (overwriting each other's
  assembler/ppu output)

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@24024 3ad0048d-3df7-0310-abae-a5850022a9f2
  * prevent previously freed temp blocks from getting lost occasionally (can
    significantly reduce the stack frame size, more than 3 times in one place
    in the compiler)

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@24025 3ad0048d-3df7-0310-abae-a5850022a9f2