Utils: Convert to SmallStringView for comparison

Change-Id: I38d9716225b81091e8e75b26c9c2258a2aefa987
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

src/libs/utils/smallstringfwd.h

@@ -29,9 +29,15 @@ namespace Utils {
 
 using uint = unsigned int;
 
+class SmallStringView;
 template <uint Size>
 class BasicSmallString;
 using SmallString = BasicSmallString<31>;
 using PathString = BasicSmallString<190>;
 
+inline
+int compare(SmallStringView first, SmallStringView second) noexcept;
+inline
+int reverseCompare(SmallStringView first, SmallStringView second) noexcept;
+
 } // namespace Utils