Allow implicit-fallthrough warnings locally.

It will be a global error by default.

Test: make checkbuild
Bug: 112564944
Change-Id: I13a176a8f439c95e1c7d57caf54fc7eb9a4b4efb
Exempt-From-Owner-Approval: do not block on new warnings
diff --git a/support.bp b/support.bp
index 1dccf29..0b1c5e1 100644
--- a/support.bp
+++ b/support.bp
@@ -181,5 +181,8 @@
         "-DGEMMLOWP_USE_STLPORT",
         // TODO: why isn't this picked up from the host GLOBAL_CFLAGS?
         "-D__STDC_FORMAT_MACROS",
+
+        // Allow implicit fallthrough in rsContext.cpp:414 until it is fixed.
+        "-Wno-error=implicit-fallthrough",
     ],
 }