Extend Valgrind suppressions for non-inlined C code.

Thanks to Dennis Schridde.

src/lj.supp

@@ -24,3 +24,18 @@
    Memcheck:Cond
    fun:lj_str_new
 }
+{
+   Optimized string compare
+   Memcheck:Addr4
+   fun:lj_str_fastcmp
+}
+{
+   Optimized string compare
+   Memcheck:Addr1
+   fun:lj_str_fastcmp
+}
+{
+   Optimized string compare
+   Memcheck:Cond
+   fun:lj_str_fastcmp
+}