GPAMem: fix gpa offset concatenation

[Tang-Haojin]

No description provided.

[XiangShanRobot]

[Generated by IPC robot]
commit: 8db72d2

commit	astar	copy_and_run	coremark	gcc	gromacs	lbm	linux	mcf	microbench	milc	namd	povray	wrf	xalancbmk
8db72d2	1.855	0.450	2.103	1.177	2.478	2.594	2.328	0.957	1.398	1.421	3.117	2.655	2.454	2.952

master branch:

commit	astar	copy_and_run	coremark	gcc	gromacs	lbm	linux	mcf	microbench	milc	namd	povray	wrf	xalancbmk
2316cea	1.855	0.450	2.103	1.177	2.478	2.594	2.328	0.957	1.398	1.421	3.117	2.655	2.454	2.952
e778bb8	1.855	0.450	2.103	1.177	2.478	2.594	2.328	0.957	1.398	1.421	3.117	2.655	2.454	2.952
c83747b	1.855	0.450	2.103	1.177	2.478	2.594	2.328	0.957	1.398	1.421	3.117	2.655	2.454	2.952
d7a3496	1.855	0.450	2.103	1.177	2.478	2.594	2.332	0.957	1.398	1.421	3.117	2.655	2.454	2.952
5961467	1.855	0.450	2.103	1.177	2.478	2.594	2.333	0.957	1.398	1.421	3.117	2.655	2.454	2.952
4b40434	1.855			1.177	2.478	2.594		0.957		1.421	3.117		2.454	2.952
9eee369	1.854	0.450	2.103	1.190	2.468	2.593	2.330	0.960	1.377	1.427	3.123	2.639	2.451	2.960
006b878	1.854	0.450	2.103	1.190	2.468	2.593	2.330	0.960	1.377	1.427	3.123	2.639	2.451	2.960
7299828	1.854	0.450	2.103	1.190	2.468	2.593	2.330	0.960	1.377	1.427	3.123	2.639	2.451	2.960
0c70648	1.854	0.450	2.103	1.190	2.468	2.593	2.330	0.960	1.377	1.427	3.123	2.639	2.451	2.960