[Driver] Support sanitized libraries on Fuchsia

When using sanitizers, add <resource_dir>/<target>/lib/<sanitizer>
to the list of library paths to support using sanitized version of
runtime libraries if available.

Differential Revision: https://reviews.llvm.org/D53487

llvm-svn: 345537
diff --git a/clang/lib/Driver/ToolChains/CommonArgs.h b/clang/lib/Driver/ToolChains/CommonArgs.h
index e8ebe22..291f804 100644
--- a/clang/lib/Driver/ToolChains/CommonArgs.h
+++ b/clang/lib/Driver/ToolChains/CommonArgs.h
@@ -32,6 +32,10 @@
 bool addSanitizerRuntimes(const ToolChain &TC, const llvm::opt::ArgList &Args,
                           llvm::opt::ArgStringList &CmdArgs);
 
+void addSanitizerPathLibArgs(const ToolChain &TC,
+                             const llvm::opt::ArgList &Args,
+                             llvm::opt::ArgStringList &CmdArgs);
+
 void linkSanitizerRuntimeDeps(const ToolChain &TC,
                               llvm::opt::ArgStringList &CmdArgs);