This patch fixes the following two issues with the createCmpJE for
AArch64:
1. Avoids overwriting the value of the input register RegNo by use XZR
as the destination register.
subs xzr, RegNo, #Imm
which is equivalent to a simple
cmp RegNo, #Imm
2. The immediate operand to the Bcc instruction must be EQ instead of
#Imm.
This patch also adds a new function for createCmpJNE and unit tests for
the both createCmpJE and createCmpJNE for X86 and AArch64.
b9891715af