ref-classes.xml: fix typo in ICECC_CC variable

index c4f15c9..3949b4a 100644
@@ -1170,7 +1170,7 @@
         Depending on each configure or compile, the OpenEmbedded build system
         adds the directories at the head of the <filename>PATH</filename> list
         and then sets the <filename>ICECC_CXX</filename> and
-        <filename>ICEC_CC</filename> variables, which are the paths to the
+        <filename>ICECC_CC</filename> variables, which are the paths to the
         <filename>g++</filename> and <filename>gcc</filename> compilers,
         respectively.
     </para>