[llvm-profgen] Filter out oversized LBR ranges.

As a follow up to {D123271}, LBR ranges that are too big should also be considered as invalid.

For example, the last two pairs in the following trace form a range [0x0d7b02b0, 0x368ba706] that covers a ton of functions in the binary. Such oversized range should also be ignored.

   0x0c74505f/0x368b99a0 **0x368ba706**/0x0c745040  0x0d7b1c3f/**0x0d7b02b0**

Add a defensive check to filter out those ranges based that the valid range should not cross the unconditional branch(Call, return, unconditional jmp).

Reviewed By: hoy, wenlei

Differential Revision: https://reviews.llvm.org/D125448