[llvm-rc] Use proper search algorithm for finding resources.
Previously we would only look in the current directory for a
resource, which might not be the same as the directory of the
rc file. Furthermore, MSVC rc supports a /I option, and can
also look in the system environment. This patch adds support
for this search algorithm.
Differential Revision: https://reviews.llvm.org/D38740
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@315499 91177308-0d34-0410-b5e6-96231b3b80d8
12 files changed
