[X86][SSE] Added more tests for vector multiplications as utility for D37896

Added additional tests for vector multiplications with multipliers that are:
 * powers of 2 displaced by 1,
 * product of a power of 2 displaced by one with another power of 2.

Patch by @pacxx (Michael Haidl)

Differential Revision: https://reviews.llvm.org/D38350

llvm-svn: 314504