Fix a few typos

Reviewed-by: Francisco Jerez <currojerez@riseup.net>
diff --git a/src/mesa/program/prog_cache.c b/src/mesa/program/prog_cache.c
index 34609f0..ed93af7 100644
--- a/src/mesa/program/prog_cache.c
+++ b/src/mesa/program/prog_cache.c
@@ -77,7 +77,7 @@
 
 
 /**
- * Rebuild/expand the hash table to accomodate more entries
+ * Rebuild/expand the hash table to accommodate more entries
  */
 static void
 rehash(struct gl_program_cache *cache)