Set -Wframe-larger-than=25344 for a typical cmake clang compile.

This ensures that in the "usual" development process building and
running the tests will enforce this stack limit, which is encountered
in google3. This will prevent future development from adding code
and tests which blow over this limit and break google3

Change-Id: If722c7029cca63eb7d1e80de4b640b84839bb020
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/66867
Reviewed-by: David Benjamin <[email protected]>
Commit-Queue: David Benjamin <[email protected]>
Auto-Submit: Bob Beck <[email protected]>

CMakeLists.txt

@@ -141,7 +141,7 @@ if(CMAKE_COMPILER_IS_GNUCXX OR CLANG)
   endif()
 
   if(CLANG)
-    set(C_CXX_FLAGS "${C_CXX_FLAGS} -Wnewline-eof -fcolor-diagnostics")
+    set(C_CXX_FLAGS "${C_CXX_FLAGS} -Wnewline-eof -fcolor-diagnostics -Wframe-larger-than=25344")
   else()
     # GCC (at least 4.8.4) has a bug where it'll find unreachable free() calls
     # and declare that the code is trying to free a stack pointer.