Update gcov patch in documentation

.. to reflect the recent changes w.r.t avoiding
trouble with the coreboot pre-commit hooks.

and fix two whitespace errors.

Change-Id: I6c94e95dd439940cf3b44231c8aab5126e9d45c7
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/2158
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Reviewed-by: Martin Roth <martin.roth@se-eng.com>
diff --git a/src/lib/libgcov.c b/src/lib/libgcov.c
index 6107407..47a427f 100644
--- a/src/lib/libgcov.c
+++ b/src/lib/libgcov.c
@@ -818,7 +818,7 @@
  *
  * -- the stored candidate on the most common value of the measured entity
  * -- counter
- * -- total number of evaluations of the value 
+ * -- total number of evaluations of the value
  */
 void
 __gcov_merge_single (gcov_type *counters, unsigned n_counters)
@@ -858,7 +858,7 @@
  * -- the last value of the measured entity
  * -- the stored candidate on the most common difference
  * -- counter
- * -- total number of evaluations of the value 
+ * -- total number of evaluations of the value
  */
 void
 __gcov_merge_delta (gcov_type *counters, unsigned n_counters)