Update AUTHOR file with ibm's new email format

R=marja@chromium.org, mstarzinger@chromium.org
BUG=
LOG=N

Change-Id: Ida5496ac957343c63177697c39e502d952881a26
Reviewed-on: https://chromium-review.googlesource.com/535755Reviewed-by: Marja Hölttä <marja@chromium.org>
Commit-Queue: Jaideep Bajwa <bjaideep@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#46103}

AUTHORS

@@ -20,7 +20,7 @@ Imagination Technologies, LLC <*@imgtec.com>
 Loongson Technology Corporation Limited <*@loongson.cn>
 Code Aurora Forum <*@codeaurora.org>
 Home Jinni Inc. <*@homejinni.com>
-IBM Inc. <*@*.ibm.com>
+IBM Inc. <*@*ibm.com>
 Samsung <*@*.samsung.com>
 Joyent, Inc <*@joyent.com>
 RT-RK Computer Based System <*@rt-rk.com>