[Sanitizer] Fix test

I broke the build, panicked and applied the wrong fix in my previous
commit. The ASSERT was obsolete, but not the call INTERCEPT_FUNCTION.

llvm-svn: 359336

compiler-rt/lib/interception/tests/interception_linux_test.cc

@@ -50,6 +50,8 @@ TEST(Interception, GetFuncAddr) {
 }
 
 TEST(Interception, Basic) {
+  INTERCEPT_FUNCTION(isdigit);
+
   // After interception, the counter should be incremented.
   InterceptorFunctionCalled = 0;
   EXPECT_NE(0, isdigit('1'));