Improve some of the conversion warnings to fire on conversion to bool.

Moves the bool bail-out down a little in SemaChecking - so now
-Wnull-conversion and -Wliteral-conversion can fire when the target type is
bool.

Also improve the wording/details in the -Wliteral-conversion warning to match
the -Wconstant-conversion.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@156826 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/SemaTemplate/member-template-access-expr.cpp b/test/SemaTemplate/member-template-access-expr.cpp
index c95b57d..f105ba8 100644
--- a/test/SemaTemplate/member-template-access-expr.cpp
+++ b/test/SemaTemplate/member-template-access-expr.cpp
@@ -60,7 +60,7 @@
 
 void test_X1(X1 x1) {
   float *fp1 = x1.f1<>(17);
-  float *fp2 = x1.f1<int>(3.14); // expected-warning {{implicit conversion turns literal floating-point number into integer}}
+  float *fp2 = x1.f1<int>(3.14); // expected-warning {{implicit conversion from 'double' to 'int' changes value from 3.14 to 3}}
   int *ip1 = x1.f1(17);
   float *ip2 = x1.f1(3.14);