Fix sizeof-pointer-memaccess warning with gcc 4.8

This patch fixes wrong memcpy size when copying ltk value to
HCI_OP_LE_LTK_REPLY command.
Fix warnings for gcc-4.9

Change-Id: I07eb9f9d24e9524fbe28ffd563f5e9d079da49df
Merge branch 'cm-11.0' into kk_mkt