Suppress cert-dcl16-c clang-tidy warnings

Bug: 120614316
Test: make with WITH_TIDY=1 DEFAULT_GLOBAL_TIDY_CHECKS=-*,cert-dcl16-c
Change-Id: Iab21f41806d81268ebc13bb9605920b4b8e825c9
diff --git a/libm/Android.bp b/libm/Android.bp
index e4ba20d..80c09dd 100644
--- a/libm/Android.bp
+++ b/libm/Android.bp
@@ -504,6 +504,9 @@
         "-Wl,--Bsymbolic-functions",
     ],
 
+    // b/120614316, non-critical readibility check
+    tidy_checks: ["-cert-dcl16-c"],
+
     include_dirs: ["bionic/libc"],
     system_shared_libs: ["libc"],