Fix the Thumb test for vfloat intrinsics

Summary:
This test was not testing the intrinsics. A function like this:

define %v4f32 @test_v4f32.floor(%v4f32 %a){
...
        %1 = call %v4f32 @llvm.floor.v4f32(%v4f32 %a)
...
}

is transformed into the following assembly:

_test_v4f32.floor:              @ @test_v4f32.floor
...
        bl _floorf
...

In each function tested, there are two CHECK: one that checked
for the label and another one for the intrinsic that should be used
inside the function (in our case, "floor"). However, although the
first CHECK was matching the label, the second was not matching the
intrinsic, but the second "floor" in the same line as the label.

This is fixed by making the first CHECK match the entire line.

Reviewers: jmolloy, rengolin

Subscribers: rengolin, llvm-commits

Differential Revision: https://reviews.llvm.org/D24398

llvm-svn: 281211