Fix a bunch of trivial cases of 'CHECK[^:]*$' in the tests. NFCI

I looked into adding a warning / error for this to FileCheck, but there doesn't
seem to be a good way to avoid it triggering on the instances of it in RUN lines.

llvm-svn: 244481
diff --git a/llvm/test/CodeGen/PowerPC/rm-zext.ll b/llvm/test/CodeGen/PowerPC/rm-zext.ll
index 97c546c..df5fe4f 100644
--- a/llvm/test/CodeGen/PowerPC/rm-zext.ll
+++ b/llvm/test/CodeGen/PowerPC/rm-zext.ll
@@ -9,7 +9,7 @@
   %shr2 = lshr i32 %mul, 5
   ret i32 %shr2
 
-; CHECK-LABEL @foo
+; CHECK-LABEL: @foo
 ; CHECK-NOT: rldicl 3, {{[0-9]+}}, 0, 32
 ; CHECK: blr
 }
@@ -23,7 +23,7 @@
   %or = or i32 %shr, %shl
   ret i32 %or
 
-; CHECK-LABEL @test6
+; CHECK-LABEL: @test6
 ; CHECK-NOT: rldicl 3, {{[0-9]+}}, 0, 32
 ; CHECK: blr
 }
@@ -34,7 +34,7 @@
   %cond = select i1 %cmp, i32 %a, i32 %b
   ret i32 %cond
 
-; CHECK-LABEL @min
+; CHECK-LABEL: @min
 ; CHECK-NOT: rldicl 3, {{[0-9]+}}, 0, 32
 ; CHECK: blr
 }