forked from amazingfate/loongoffice
a25bec0cb20671a8a8e2eacd61138773f4275875 "Properly absolutize all registry
arguments of uno executable" at least broke testtools/CustomTarget_uno_test.mk
on Windows, where some -ro argument system path starting with a drive letter
("C:/...") is passed in, which rtl::Uri::convertRelToAbs mis-interprets as a
URI with scheme "c".
Switching to osl::FileBase::getAbsoluteFileURL started to break Linux, where
osl_getAbsoluteFileURL for whatever reason calls
osl::FileBase::getSystemPathFromFileURL, which in turn for whetever reason
rejects relative input that starts with "/". The easiest fix that appears not
to break anything else appears to be the workaround now added to
osl_getAbsoluteFileURL.
Change-Id: If03e7136ecc2c26a8f31e591257b1886f3ab129b