Bump third-party/libswiftnav from 3ef6140 to 87d3e1f

dependabot[bot] · web-flow · commit 438b022f23b4 · 2021-03-01T13:02:40.000Z
Bumps [third-party/libswiftnav](https://github.com/swift-nav/libswiftnav) from `3ef6140` to `87d3e1f`. - [Release notes](https://github.com/swift-nav/libswiftnav/releases) - [Commits](swift-nav/libswiftnav@3ef6140...87d3e1f) Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/third-party/libswiftnav b/third-party/libswiftnav
@@ -1 +1 @@
-Subproject commit 3ef6140f5e09e50e3292bc91a4511e33fefa5a6c
+Subproject commit 87d3e1f627da205e9ba0c908e178cb81b33a413f
