..., add the configure test flags and rename DLOPEN_LIBS to
UNIX_DLAPI_LIBS.
Initinally convert two dlsym callers to use HAVE_DLAPI and
osl_getAsciiFunctionSymbol.
There are a lot of places, which still use -ldl and even more
direct dlsym calls; good opportunity for many simple EasyHacks.
Change-Id: I4f2d2f7cb079a075af8f9d01eb5ee45de40c7f03
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/128523
Tested-by: Jenkins
Reviewed-by: Jan-Marek Glogowski <glogow@fbihome.de>