Fix typo

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/library/Makefile b/library/Makefile
index 5b18e3a..e4fb643 100644
--- a/library/Makefile
+++ b/library/Makefile
@@ -29,7 +29,7 @@
 LDFLAGS ?=
 
 # Include ../include, ../tf-psa-crypto/include and
-# ../tf-psa-crypto/drivers/builtin/includefor public headers and . for
+# ../tf-psa-crypto/drivers/builtin/include for public headers and . for
 # private headers. Note that . needs to be included explicitly for the sake of
 # library files that are not in the /library directory (which currently means
 # under /3rdparty).