Added testcase for commit r122963.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@122964 91177308-0d34-0410-b5e6-96231b3b80d8

test/Lexer/11-27-2007-FloatLiterals.c

@@ -4,8 +4,10 @@
 // CHECK: 2.000000e+{{[0]*}}32
 // CHECK: 0x3BFD83C940000000
 // CHECK: 2.000000e+{{[0]*}}32
+// CHECK: 0x7FF0000000000000
 
 float  F  = 1e-19f;
 double D  = 2e32;
 float  F2 = 01e-19f;
 double D2 = 02e32;
+float  F3 = 0xFp100000000000000000000F;