better name for a function in compilerplugins

The function is not just about a spelling location.

Change-Id: I96e9e9ef7e27a9763397b4b86473c1c30d0e3eeb
Reviewed-on: https://gerrit.libreoffice.org/80381
Tested-by: Jenkins
Reviewed-by: Luboš Luňák <l.lunak@collabora.com>

compilerplugins/clang/methodcycles.cxx

@@ -176,7 +176,7 @@ MyFuncInfo MethodCycles::niceName(const FunctionDecl* functionDecl)
 std::string MethodCycles::toString(SourceLocation loc)
 {
     SourceLocation expansionLoc = compiler.getSourceManager().getExpansionLoc(loc);
-    StringRef name = getFileNameOfSpellingLoc(expansionLoc);
+    StringRef name = getFilenameOfLocation(expansionLoc);
     std::string sourceLocation
         = std::string(name.substr(strlen(SRCDIR) + 1)) + ":"
           + std::to_string(compiler.getSourceManager().getSpellingLineNumber(expansionLoc));