[sancov] Move __sancov_default_options declaration outside the namespace __sancov

After this commint, we can include sancov_flags.h and refer to
__sancov_default_options without requiring the namespace prefix.

Differential Revision: https://reviews.llvm.org/D29167

llvm-svn: 293731

compiler-rt/lib/sanitizer_common/sancov_flags.h

@@ -32,9 +32,9 @@ inline SancovFlags* sancov_flags() { return &sancov_flags_dont_use_directly; }
 
 void InitializeSancovFlags();
 
+}  // namespace __sancov
+
 extern "C" SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE const char*
 __sancov_default_options();
 
-}  // namespace __sancov
-
 #endif