Bump third-party/libswiftnav from d6a2bbc to c79fc26 (#38)

dependabot[bot] · web-flow · commit 2be62ccdf4ec · 2021-02-09T18:32:08.000Z
diff --git a/third-party/libswiftnav b/third-party/libswiftnav
@@ -1 +1 @@
-Subproject commit d6a2bbc7a1b12f821b2eb059bc926376f606c26c
+Subproject commit c79fc26e4df99300146a855714092b0ad8043e86
