[PATCH v6 2/3] doc: add missing index entry for thread

[Tyler Retzlaff]

Add missing thread index referencing rte_thread.h under the basic
topic.

Signed-off-by: Tyler Retzlaff <roretzla at linux.microsoft.com>
Reviewed-by: David Marchand <david.marchand at redhat.com>
---
 doc/api/doxy-api-index.md | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/api/doxy-api-index.md b/doc/api/doxy-api-index.md
index de488c7..2deec7e 100644
--- a/doc/api/doxy-api-index.md
+++ b/doc/api/doxy-api-index.md
@@ -210,7 +210,8 @@ The public API headers are grouped by topics:
   [random](@ref rte_random.h),
   [config file](@ref rte_cfgfile.h),
   [key/value args](@ref rte_kvargs.h),
-  [string](@ref rte_string_fns.h)
+  [string](@ref rte_string_fns.h),
+  [thread](@ref rte_thread.h)
 
 - **debug**:
   [jobstats](@ref rte_jobstats.h),
-- 
1.8.3.1