spell: fix comment typos: /include

Change-Id: I20d315ef5f8a2da5cfe28b194126907adda9e13c
Signed-off-by: David B. Kinder <david.b.kinder@intel.com>
diff --git a/include/linker-tool-gcc.h b/include/linker-tool-gcc.h
index c04fd96..7071163 100644
--- a/include/linker-tool-gcc.h
+++ b/include/linker-tool-gcc.h
@@ -90,7 +90,7 @@
 
 /*
  * As for SECTION_PROLOGUE(), except that this one must (!) be used
- * for data sections which on XIP platforms will have differeing
+ * for data sections which on XIP platforms will have differing
  * virtual and load addresses (i.e. they'll be copied into RAM at
  * program startup).  Such a section must (!) also use
  * GROUP_LINK_IN_LMA to specify the correct output load address.