fdo#82430: MSVC build: avoid using SSE2 instructions in some externals

Hopefully this should fix up the most important external libraries.

(cherry picked from commit cd42e5f3e2eb9540b16e568559e6e95ffd7cc2a7)

Conflicts:
	external/coinmp/UnpackedTarball_coinmp.mk
	external/icu/ExternalProject_icu.mk
	external/lcms2/UnpackedTarball_lcms2.mk
	external/python3/UnpackedTarball_python3.mk

Change-Id: I744cb5a2ce7fafb10852059050cf24589d6ca400
Reviewed-on: https://gerrit.libreoffice.org/11769
Reviewed-by: Christian Lohmaier <lohmaier+LibreOffice@googlemail.com>
Tested-by: Christian Lohmaier <lohmaier+LibreOffice@googlemail.com>