fdo#74825: fix missing lcms2/libxslt/curl in installation sets

The assumption that all configure variables had been normalized to
TRUE/<empty> turned out not to hold; convert a bit more in that
direction.

(regression from 4af38b099c741c3676aefeb20c515913aaeed666)

Change-Id: I2127c515e8a833a07c9b26ed9d693ce5a1853fe4
normalize values of SYSTEM_LIBATOMIC_OPS, SYSTEM_FIREBIRD

Change-Id: I89802da0ad7f7bf838a8937430825b0adf42a6ee
normalize values of SYSTEM_ZLIB, SYSTEM_DICTS, SYSTEM_FONTCONFIG

Change-Id: I7530cb9d0797df5fc86695b0379cc44c159d2ab5
normalize values of SYSTEM_CLUCENE, SYSTEM_EXPAT, SYSTEM_JPEG

Change-Id: I343dae79b01e1369722c7bbd1ab2c36e2bfa96ac
normalize values of SYSTEM_FREETYPE, SYSTEM_LIBXML, SYSTEM_MARIADB

Change-Id: Iffcc671ca41c5880579effe0786a3b4d3be0dab0
normalize values of SYSTEM_PYTHON, SYSTEM_MYSQL_CPPCONN

Change-Id: I8932febdd39c35f23fb3a89703b69e25302f5678
normalize values of SYSTEM_CAIRO

Change-Id: I7ba86a2606d585b7b4351bc1fcd6d8ceebca5fd7
normalize values of SYSTEM_BOOST

Change-Id: I2fce6545d7f279e0e2d6f3ff53eee1ab82314135
normalize values of SYSTEM_HSQLDB, SYSTEM_POSTGRESQL

Change-Id: Ia29a173ab6bb3442f98cd6db4db67ad27e7fa9a1
normalize values of SYSTEM_GLM, SYSTEM_VIGRA

Change-Id: Idc28f8be610aae57477f18c26ffcb97a24a2ab82
normalize values of SYSTEM_ODBC_HEADERS, SYSTEM_OPENLDAP

Change-Id: I913c38878a110625747fbf32ad9c43ad0dab30d3
normalize values of SYSTEM_NPAPI_HEADERS, SYSTEM_ICU

Change-Id: I7f1153e4a07a4116417a7734d867f2d0feda1ee4
normalize values of SYSTEM_HUNSPELL, SYSTEM_HYPH

Change-Id: Ib11dcf94263aefc68ae2e831baeeb957231793ae
normalize valuse of SYSTEM_MYTHES, SYSTEM_LPSOLVE

Change-Id: Ie61f6a0e572dcc3cdc4cbca698fb90d67f9a87ad
normalize values of SYSTEM_BLUEZ, SYSTEM_MESA_HEADERS

Change-Id: I166de66dd8cd58a05e1a9e8d2f25bf95b98297fb
normalize values of SYSTEM_POPPLER, SYSTEM_JFREEREPORT

Change-Id: I8034b6fdf85697b6b409143396983ef3170257b2
normalize values of SYSTEM_APACHE_COMMONS, SYSTEM_BSH

Change-Id: Ia6adb8ae07ec80e83bc67084dfbd0bc6136ed8b7
normalize values of SYSTEM_RHINO, SYSTEM_LIBLANGTAG

Change-Id: I656e90024d35ef8189727e6a39815ef4e4fb330b